Baseline visit v1 schema · facts legacy-derived · descriptive report

www.nih.gov

https://www.nih.gov/

Jul 27, 2026, 10:24 AM UTC

complete; derived from status and warnings

View site historyScan this exact route againReport an evidence problem

Public corrections ledger · SBL-CORR-2026-001

This report has a reviewed clarification

SBL-CORR-2026-001: The historical input-probe disclosure overstates coverage. Unload-only transmissions were not reliably recorded. Focus and blur handlers could run, and per-field failures were not fully counted. These reports cannot establish absence of input transmission outside their retained observations.

Read the public review record

Comparison Reportv1 schema · facts legacy-derived · descriptive report

Brave-list blocking off/on comparison

https://www.nih.gov/
SharePDF + evidence

What this actually means

nih.gov recorded 18 fewer third-party requests in the visit configured for Brave-list blocking.

SBL-CORR-2026-001: The historical input-probe disclosure overstates coverage. Unload-only transmissions were not reliably recorded. Focus and blur handlers could run, and per-field failures were not fully counted. These reports cannot establish absence of input transmission outside their retained observations.

3tracking-service entities
22cross-site requests
Observed in two automated visits: evidence to check, not a verdict.
Post on X

Plain-Language Findings

What this visit means

Unfamiliar terms are defined in the glossary
playwright-chromium

Worth checking

Bottom line: this visit has review-worthy signals

The scan observed signals a non-expert should not have to decode from raw request tables.

The cards below translate the evidence into plain language; severity reflects fixed reference thresholds, not measured population percentiles. The request log, domain table, and methodology remain below for verification.

111 requests observed in one controlled visit.

Worth checking

22 requests matched Brave Shields filter lists

22 requests matched the default filter lists of Brave Shields, the ad and tracker blocker built into the Brave browser, while loading normally.

Computed with Brave's own ad-block engine and default filter lists in classification mode: matched requests were not blocked by the scanner and remain in this report's observed request counts. Matching shows what Shields would target on this visit's traffic; an actual Shields visit blocks these and also prevents their follow-on requests, so this number is neither a measured block count nor the total effect.

The hand-curated service catalog separately matched 17 request rows in this visit.Show matched requests

Nothing observed

Lower values observed across comparable metrics in the Brave-list blocking attempt

With the scanner configured to apply Brave's ad-block engine and default Shields filter lists (a simulation in this scanner's browser, not a live Brave-browser visit; application was not verified), this paired visit showed 18 fewer third-party requests and 15 fewer tracking-related service requests.

Services only seen in the unblocked visit: Google and Crazy Egg. The blocking visit's engine directly blocked 6 requests; the remaining difference may include follow-on requests that never started once their sources were blocked. A single paired comparison can also reflect run-to-run variance (ad rotation, caching, experiments), so treat this as an observed difference, not a measured blocking rate.

Signed per-metric differences between the two visits; nothing is summed across metrics.Show matched requests

Context

Tracking companies the privacy policy does not appear to name

Pinterest and Crazy Egg were sent requests during this visit, but the policy text matched none of the names this scan knows those companies by.

Policies often disclose vendor categories rather than company names, so an unnamed vendor is a transparency gap worth reviewing, not automatically a violation. Named in the policy: Google.

Policy at https://www.nih.gov/privacy-policy; 0 checkable statements matched; 1 of 3 observed tracking companies named in the policy.

Context

Requests were dispatched to catalogued service domains

Google, Pinterest and Crazy Egg appeared in the request log.

A catalog match identifies a maintainer-reviewed service/domain mapping; it does not establish why an individual request occurred, what it carried, or whether profiling happened. Functional catalog labels include analytics / tag management, social / advertising pixel and session replay / behavior analytics. This scan could not identify 4 of the 9 third-party hosts recorded here, so it cannot say who operates them. That is a limit of identity coverage, not evidence about the site. Catalog labels include session-replay or behavior-analytics services: Crazy Egg; the domain match alone does not prove that a recording occurred.

22 cross-site requests across 9 third-party hosts.Modest distinct tracking-service entities count.Show third-party requests

Context

Requests were dispatched to catalogued major-platform domains

This visit dispatched requests to catalogued domains for Google and Pinterest.

The domain matches identify services, not the requests' purpose, payload, or whether any profile linking occurred.

16 requests to these platforms.Show catalog-matched requests

Nothing observed

Google Analytics present, no remarketing signal

Google Analytics was observed, but no DoubleClick remarketing sync appeared in this visit.

Standard analytics collection was observed, without the stats.g.doubleclick.net advertising sync.

Google Analytics host observed; no stats.g.doubleclick.net request.Show catalog-matched requests

Nothing observed

No third-party cookies observed

The automated visit did not observe third-party cookies.

This does not prove the site never uses cookies; it means this visit did not observe third-party cookies.

7 cookies total in this report.No third-party cookies observed.

Context

Session-replay vendor observed

Crazy Egg appeared in the request log.

This is a behavioral instrumentation signal from listener registration, stack-attributed script origins, and known-vendor requests: it shows the page was instrumented to observe interaction, not that anything was transmitted. Stack attribution records the script origins present in the bounded registration call chain; a cross-site origin in that chain does not by itself establish that the cross-site script registered the listener, because first-party code can register its own listeners through a helper served from elsewhere. A different registrable domain is also not by itself a different operator: sites commonly serve their own scripts from a separate asset domain, so the card says third party only when the catalog or reviewed ownership attributes an origin to another organization. On scanners that run the active keystroke-capture probe, actual transmission is tested separately (a synthetic value is typed, never real input, and no typed values are collected); treat this card as a review prompt rather than proof.

known session-replay vendor(s): Crazy Egg

Nothing observed

No fingerprint-like API calls observed

The scan did not observe the instrumented high-entropy browser APIs.

This is an observation layer, not proof that fingerprinting is impossible.

0 API families recorded.

Brave Shields Comparison

No blocking → Brave-list blocking delta

No blocking: 6,263msBrave-list blocking: 6,038ms
Some deltas are not comparable across these two visits and are not shown.
  • Other detector and causal-path deltas (each visit's own evidence still renders below): v1 never recorded detector versions, so fingerprinting and pixel deltas cannot be proven to come from matching instrumentation.
  • The Shields-number delta (each visit's own evidence still renders below): The two visits measured different Shields quantities (filter-list matches vs engine-blocked requests), which must never share a delta.
  • Fingerprinting deltas (each visit's own evidence still renders below): At least one visit did not complete the fingerprint measurement, so no exact cross-visit delta is shown.
  • Ad-pixel deltas (each visit's own evidence still renders below): At least one visit did not complete the pixel measurement, so no exact cross-visit delta is shown.
Requests-26No blocking: 111 · Brave-list blocking: 85
Third-party requests-18No blocking: 22 · Brave-list blocking: 4
Third-party domains-6No blocking: 9 · Brave-list blocking: 3
Cookies-5No blocking: 7 · Brave-list blocking: 2
Third-party cookies0No blocking: 0 · Brave-list blocking: 0
Storage keys0No blocking: 0 · Brave-list blocking: 0
Catalog-matched requests-15No blocking: 17 · Brave-list blocking: 2

Every signed change is Brave-list blocking minus No blocking. A positive or negative direction is descriptive, not a judgment that the result is better or worse.

Cookie and storage count deltas include every observation. Name-level lists show only reviewed names; unreviewed names are not itemized because they can contain identifiers.

Largest per-domain request-count changes

www.google-analytics.comGoogle · analytics / tag managementNo blocking: 9 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-9
www.nih.govfirst partyNo blocking: 89 · Brave-list blocking: 81Show No blocking requests · Show Brave-list blocking requests-8
www.googletagmanager.comGoogle · analytics / tag managementNo blocking: 4 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-4
*.digitalgov.govunlabeled third partyNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.crazyegg.comCrazy Egg · session replay / behavior analyticsNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
*.pinterest.comPinterest · social / advertising pixelNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1
static.cloudflareinsights.comunlabeled third partyNo blocking: 1 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-1

Domains only with Brave-list blocking

No domain changes observed.

Domains only with No blocking

www.google-analytics.comGoogle · analytics / tag management · Show No blocking requests9
www.googletagmanager.comGoogle · analytics / tag management · Show No blocking requests4
*.digitalgov.govunlabeled · Show No blocking requests2
*.crazyegg.comCrazy Egg · session replay / behavior analytics · Show No blocking requests1
*.pinterest.comPinterest · social / advertising pixel · Show No blocking requests1
static.cloudflareinsights.comunlabeled · Show No blocking requests1

Visible cookie names only with Brave-list blocking

No visible cookie-name changes to show; privacy-filtered names are not itemized.

Visible cookie names only with No blocking

_ga.nih.govfirst-party
_gid.nih.govfirst-party

Storage keys only with Brave-list blocking

No storage key changes observed.

Storage keys only with No blocking

No storage key changes observed.

Entities only with Brave-list blocking

No entity changes observed.

Entities only with No blocking

Google2 domains13
Crazy Egg1 domain1

Measurement limits

7 conditions affect how this evidence reads

This report

  • Brave-list blocking comparison runs should be collected under matched crawl conditions, and the blocking run is a simulation with Brave's engine and default lists in this scanner's browser, not a live Brave visit. Differences can still reflect timing, experiments, cache state, consent state, or bot detection.
  • The two visits ran in randomized order; the "Brave-list blocking" visit ran first.

Both visits

  • Each visit in this report is one automated, headless Chromium visit from a fixed en-US / UTC profile, with no scrolling, clicking, or consent interaction. Sites can behave differently for real users, browsers, regions, accounts, or network locations.
  • Counts are a lower bound: trackers that load only after interaction or consent are not observed; Service Workers are blocked, and Web Worker or WebSocket traffic may be incomplete. Service labels use a US-biased hand-curated catalog, so regional services may be under-labeled. Cookie and storage figures are an end-of-visit snapshot, with storage keys read from the top frame only.
  • This scan typed a synthetic test value into 1 form field (never submitting the form) to test whether typed input is captured and sent to third parties. The value is synthetic and is not stored. Requests the page sent during and after this typing, including any unload beacons, are part of the recorded request log and counts.
  • Read the site's privacy policy (https://www.nih.gov/privacy-policy) and compared its text against this visit's observed behavior. Policy checks are an automated text match with the matched sentences quoted, not a legal reading.

Brave-list blocking visit only

  • Brave Shields block simulation was enabled; matching requests were aborted before loading and are not included in request totals.

How to use this report

Read the findings and measurement limits first, then inspect the evidence for each recorded visit. Comparisons include both visits, even where a difference cannot be interpreted.

Keep this PDF with its evidence package: the source JSON, correction context, export receipt and SHA256SUMS. The package preserves source bytes and the correction context at export time. Hashes check file consistency; they do not establish independent measurement accuracy or a signed attestation.

Correction context SHA-256: 8b4dc650c91f9e1a20f651118d74586978963548cecaa5885e2565e2ccc68c32

Renderer revision: 3c18992e02534f33c825f7c2e51dd534d3ccab0d

No blocking — evidence

2026-07-27T10:24:37.496Z · complete; derived from status and warnings

Retained observations from this visit. Missing measurements do not establish absence of activity.

Request attribution map

Which actor each third-party request is attributed to, from the initiator the browser reported. Attribution, not causation: an initiator may itself have been told what to fetch, and requests with no reported initiator are not distinguished from ones fetched from several. Asterisks mark subdomain labels hidden for privacy.
Attributed requests
0
Not attributable
22
Third-party requests
22

No unique actor could be assigned to 22 of these requests. That includes requests for which the browser reported no usable initiator, and repeated URLs seen with conflicting initiators. This report does not distinguish those causes, so they are counted together rather than drawn.

22 third-party requests: 0 attributed to a single recorded actor, 22 not attributable.

No retained third-party request has one recorded actor to draw. This is not evidence that no actor was involved: the visit may have reported no actor or several actors for the same request.

By the numbers

Recorded counts and evidence availability from this one visit. The findings above interpret them.
Requests11122 third-party
Matched Shields lists22classification reported by this visit; no engine readback recorded
Third-party domains93 distinct catalogued service entities
Cookies70 third-party
Storage keys0values omitted
Fingerprint API calls00 API families
GPC signalConfigured offreadback not recorded
Duration6.3s10:24:37 AM UTC

Request composition & timeline

First-party requests 89
Other third-party requests 5
Catalog-matched third-party requests 17

111 requests were recorded from 46 ms to 4,153 ms. Open the request log for exact timing and request details.

0 ms4,153 ms

Domain evidence

10 recorded domains
DomainRoleRequestsCatalog matchResource types
www.google-analytics.comservice9Google: analytics / tag managementscript, xhr, fetch
www.googletagmanager.comservice4Google: analytics / tag managementscript
assets.pinterest.comservice2Pinterest: social / advertising pixelscript
*.crazyegg.comservice1Crazy Egg: session replay / behavior analyticsscript
*.pinterest.comservice1Pinterest: social / advertising pixelimage
*.digitalgov.govthird-party2No catalog matchscript
static.cloudflareinsights.comthird-party1No catalog matchscript
*.verint-cdn.comthird-party1No catalog matchscript
*.usa.govthird-party1No catalog matchscript
www.nih.govfirst-party89No catalog matchdocument, stylesheet, script, image, other, font, xhr, ping

Request log

111 recorded requests

In hosts and URLs, * and … mark details hidden for privacy.

Request references name this visit's retained JSON rows in order (B = baseline, V = variant, S = single). R0001 is the first request row.

RefTimeStatusTypeDomainProvenanceURL
B:R000146ms200documentwww.nih.govNot attributedhttps://www.nih.gov/
B:R0002253ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0003254ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0004255ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0005256ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0006257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0007257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0008257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0009257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0010257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0011257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0012257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0013257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0014258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0015258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0016258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0017258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0018258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0019258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0020258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0021261ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0022261ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0023262ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0024262ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0025262ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0026262ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0027262ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0028263ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0029263ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0030263ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0031263ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0032263ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0033263ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0034264ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0035264ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0036265ms200scriptstatic.cloudflareinsights.comNot attributedhttps://static.cloudflareinsights.com/…
B:R0037358ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0038361ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0039367ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0040367ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0041368ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0042368ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0043368ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0044368ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0045368ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0046368ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0047368ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0048369ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0049369ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0050369ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0051369ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0052370ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0053371ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0054372ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0055372ms404script*.verint-cdn.comNot attributedhttps://*.verint-cdn.com/…
B:R0056374ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0057375ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0058375ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0059375ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0060376ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0061376ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0062376ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0063376msn/ascript*.crazyegg.comNot attributedhttps://*.crazyegg.com/…
B:R0064377ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0065377ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0066377ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0067377ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0068378ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0069378ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0070378ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0071378ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0072378ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0073378ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0074379ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0075379ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0076379ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0077379ms200scriptassets.pinterest.comNot attributedhttps://assets.pinterest.com/…
B:R0078379ms200scriptwww.googletagmanager.comNot attributedhttps://www.googletagmanager.com/…?id
B:R0079379ms200otherwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0080403ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0081403ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0082404ms200fontwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0083405ms200fontwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0084405ms200fontwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0085406ms200fontwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0086521msn/ascript*.usa.govNot attributedhttps://*.usa.gov/…
B:R0087549ms302scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0088549ms200imagewww.nih.govNot attributedhttps://www.nih.gov/…
B:R0089564ms200scriptassets.pinterest.comNot attributedhttps://assets.pinterest.com/…?…
B:R0090570ms200scriptwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0091629ms200scriptwww.googletagmanager.comNot attributedhttps://www.googletagmanager.com/…?id&…
B:R0092630ms200scriptwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…
B:R0093630ms200script*.digitalgov.govNot attributedhttps://*.digitalgov.gov/…?…
B:R0094685ms200xhrwww.nih.govNot attributedhttps://www.nih.gov/…
B:R0095709ms200script*.digitalgov.govNot attributedhttps://*.digitalgov.gov/…
B:R0096710ms200scriptwww.googletagmanager.comNot attributedhttps://www.googletagmanager.com/…?id
B:R0097710ms200scriptwww.googletagmanager.comNot attributedhttps://www.googletagmanager.com/…?id&…
B:R0098723ms200xhrwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&…&t&cid&tid
B:R0099799ms204fetchwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&tid&…&cid
B:R0100799ms204fetchwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&tid&…&cid
B:R0101800ms204fetchwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&tid&…&cid
B:R0102871ms204fetchwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&tid&…&cid
B:R0103902ms204xhrwww.nih.govNot attributedhttps://www.nih.gov/…
B:R01041,688ms200image*.pinterest.comNot attributedhttps://*.pinterest.com/?type&…&lang
B:R01054,149msn/afetchwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&tid&…&cid
B:R01064,150msn/afetchwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&tid&…&cid
B:R01074,151msn/apingwww.nih.govNot attributedhttps://www.nih.gov/…
B:R01084,151msn/afetchwww.google-analytics.comNot attributedhttps://www.google-analytics.com/…?v&tid&…&cid
B:R01094,152msn/aotherwww.nih.govNot attributedhttps://www.nih.gov/…
B:R01104,153msn/aotherwww.nih.govNot attributedhttps://www.nih.gov/…
B:R01114,153msn/aotherwww.nih.govNot attributedhttps://www.nih.gov/…

Brave-list blocking — evidence

2026-07-27T10:24:31.450Z · complete; derived from status and warnings

Retained observations from this visit. Missing measurements do not establish absence of activity.

Request attribution map

Which actor each third-party request is attributed to, from the initiator the browser reported. Attribution, not causation: an initiator may itself have been told what to fetch, and requests with no reported initiator are not distinguished from ones fetched from several. Asterisks mark subdomain labels hidden for privacy.
Attributed requests
0
Not attributable
4
Third-party requests
4

No unique actor could be assigned to 4 of these requests. That includes requests for which the browser reported no usable initiator, and repeated URLs seen with conflicting initiators. This report does not distinguish those causes, so they are counted together rather than drawn.

4 third-party requests: 0 attributed to a single recorded actor, 4 not attributable.

No retained third-party request has one recorded actor to draw. This is not evidence that no actor was involved: the visit may have reported no actor or several actors for the same request.

By the numbers

Recorded counts and evidence availability from this one visit. The findings above interpret them.
Requests854 third-party
Blocked by Brave lists6engine blocks reported by this visit; no engine readback recorded
Third-party domains31 distinct catalogued service entity
Cookies20 third-party
Storage keys0values omitted
Fingerprint API calls00 API families
GPC signalConfigured offreadback not recorded
Duration6s10:24:31 AM UTC

Request composition & timeline

First-party requests 81
Other third-party requests 2
Catalog-matched third-party requests 2

85 requests were recorded from 40 ms to 661 ms. Open the request log for exact timing and request details.

0 ms661 ms

Domain evidence

4 recorded domains
DomainRoleRequestsCatalog matchResource types
assets.pinterest.comservice2Pinterest: social / advertising pixelscript
*.verint-cdn.comthird-party1No catalog matchscript
*.usa.govthird-party1No catalog matchscript
www.nih.govfirst-party81No catalog matchdocument, stylesheet, script, image, other, font, xhr

Request log

85 recorded requests

In hosts and URLs, * and … mark details hidden for privacy.

Request references name this visit's retained JSON rows in order (B = baseline, V = variant, S = single). R0001 is the first request row.

RefTimeStatusTypeDomainProvenanceURL
V:R000140ms200documentwww.nih.govNot attributedhttps://www.nih.gov/
V:R0002252ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0003253ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0004253ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0005253ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0006253ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0007257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0008257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0009257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0010257ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0011258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0012258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0013258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0014258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0015258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0016258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0017258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0018258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0019258ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
V:R0020260ms200stylesheetwww.nih.govNot attributedhttps://www.nih.gov/…
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This versioned report is currently retained in the public corpus. Follow the currently retained site history, repeat the same public route when it is available, or request a transparent evidence correction.

Integrity and provenance

Evidence receipt

Open report JSONDownload corrections with this JSONOpen provenance sidecarPrintable versionDownload PDF + evidenceOpen PDF
Report ID
20260727-031f095b4d9e33a188e427a5324a2357
Site
www.nih.gov
Latest visit
Schema
v1 schema · facts legacy-derived · descriptive report
Verify recorded provenance

Baseline visit

Started
Run quality
complete; derived from status and warnings
Scanner
playwright-chromium
Browser
149.0.7827.55
Redaction
not recorded by this schema
Provenance
Exact build and instrument digests were not recorded by this legacy schema.

Variant visit

Started
Run quality
complete; derived from status and warnings
Scanner
playwright-chromium
Browser
149.0.7827.55
Redaction
not recorded by this schema
Provenance
Exact build and instrument digests were not recorded by this legacy schema.

Recorded provenance is self-reported measurement metadata, not a cryptographic attestation. The public versioned report JSON contains the retained public evidence; see the methodology for interpretation and retention limits.

This report covers what the scanner measures, not everything a site can do. 16 browser surfaces are not instrumented at all (Every page except the one that was scanned; Anything that only loads after scrolling or interaction; Why a request happened, as a causal chain; and 13 others), 3 capabilities are declined by policy, and 3 are outside what any single visit can see. Their absence from this report is not evidence that they did not occur. Read the published coverage boundary.

Detector accuracy is unmeasured. No calibration study currently publishes a precision or recall for the detectors on this page, so a detector match here is a recorded observation, not a calibrated classification. How detector accuracy is measured.

Approved use boundary: This report is investigative evidence that requires independent corroboration. It is not a standalone legal determination and not the sole exhibit in a legal proceeding. Recorded in this project's release manifest on .

Reports record one automated visit per condition; visits may be incomplete. Results describe these visits, not everything a site can do.