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

www.twitch.tv

https://www.twitch.tv/

Jul 27, 2026, 10:15 AM UTC

complete; derived from status and warnings

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

Scan report ready for www.twitch.tv: 292 recorded request rows.

Comparison Reportv1 schema · facts legacy-derived · descriptive report

Brave-list blocking off/on comparison

https://www.twitch.tv/ (opens in a new tab)
ShareDownloads the No blocking visit's request CSV, source report and correction context in a ZIP. Follows the evidence switcher below.PDF + evidence (opens in a new tab)Downloads a ZIP containing the PDF for every recorded visit, exact source JSON, correction context and file hashes. The scanner renders it on request.

What this actually means

twitch.tv 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
91cross-site requests
4third-party cookie records

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.

292 requests observed in one controlled visit.

Worth checking

13 requests matched Brave Shields filter lists

13 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 15 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, 4 fewer third-party cookies and 15 fewer tracking-related service requests.

Services only seen in the unblocked visit: Comscore, Amazon Ads and Nielsen. The blocking visit's engine directly blocked 12 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

Catalogued service domains recorded responses during this visit

Comscore, Amazon Ads and Nielsen 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 audience measurement and advertising. This scan could not identify 7 of the 12 third-party hosts recorded here, so it cannot say who operates them. That is a limit of identity coverage, not evidence about the site.

91 cross-site requests across 12 third-party hosts.Modest distinct tracking-service entities count.Show third-party requests

Context

Requests were dispatched to major-platform domains the catalog does not carry

This visit dispatched requests to Google domains that the reviewed ownership map names, though the service catalog carries no entry for them.

Asset and font hosts reach this state often: the ownership map establishes who operates the domain, and nothing here establishes the request's purpose or payload. These domains are not counted as catalog-matched requests.

12 cross-site domains seen overall.Show catalog-matched requests

Nothing observed

No Google Analytics observed

This visit did not contact Google Analytics.

Neither Google Analytics nor its remarketing sync was observed in this visit.

No google-analytics.com or googletagmanager.com requests.Show catalog-matched requests

Context

Third-party cookies were present

4 third-party cookies showed up during the visit.

The scanner observed cookie metadata whose domain crossed the scanned site's registrable-domain boundary. This report does not retain cookie values or partition keys, so it does not establish whether a cookie was a persistent identifier or could recognize a visitor across sites.

10 cookies total in this report.Modest third-party cookies count.

Context

Fingerprint-like browser APIs were called

4 high-entropy API calls appeared in the instrumentation log.

These calls can be legitimate (charts, graphics, media), so the count is observational, not a severity score, and it excludes Web and Service Workers. Top calls: webgl.getParameter.UNMASKED_RENDERER_WEBGL and webgl.getParameter.UNMASKED_VENDOR_WEBGL.

2 API families recorded.

Brave Shields Comparison

No blocking → Brave-list blocking delta

No blocking: 12,660msBrave-list blocking: 12,569ms
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-21No blocking: 292 · Brave-list blocking: 271
Third-party requests-18No blocking: 91 · Brave-list blocking: 73
Third-party domains-4No blocking: 12 · Brave-list blocking: 8
Cookies-4No blocking: 10 · Brave-list blocking: 6
Third-party cookies-4No blocking: 4 · Brave-list blocking: 0
Storage keys0No blocking: 14 · Brave-list blocking: 14
Catalog-matched requests-15No blocking: 15 · Brave-list blocking: 0

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

*.scorecardresearch.comComscore · audience measurementNo blocking: 6 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-6
*.amazon-adsystem.comAmazon Ads · advertisingNo blocking: 5 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-5
*.*.*.*.ttvnw.netunlabeled third partyNo blocking: 11 · Brave-list blocking: 9Show No blocking requests · Show Brave-list blocking requests-2
*.*.imrworldwide.comNielsen · audience measurementNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.ads.twitch.tvfirst partyNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.imrworldwide.comNielsen · audience measurementNo blocking: 2 · Brave-list blocking: 0Show No blocking requests · Show Brave-list blocking requests-2
*.twitch.tvfirst partyNo blocking: 17 · Brave-list blocking: 16Show No blocking requests · Show Brave-list blocking requests-1
*.*.ttvnw.netunlabeled third partyNo blocking: 11 · Brave-list blocking: 10Show No blocking requests · Show Brave-list blocking requests-1

Domains only with Brave-list blocking

No domain changes observed.

Domains only with No blocking

*.scorecardresearch.comComscore · audience measurement · Show No blocking requests6
*.amazon-adsystem.comAmazon Ads · advertising · Show No blocking requests5
*.*.imrworldwide.comNielsen · audience measurement · Show No blocking requests2
*.ads.twitch.tvunlabeled · Show No blocking requests2
*.imrworldwide.comNielsen · audience measurement · Show No blocking requests2

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

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

Visible storage keys only with Brave-list blocking

No visible storage-key changes to show; privacy-filtered keys are not itemized.

Visible storage keys only with No blocking

No visible storage-key changes to show; privacy-filtered keys are not itemized.

Entities only with Brave-list blocking

No entity changes observed.

Entities only with No blocking

Comscore1 domain6
Amazon Ads1 domain5
Nielsen2 domains4

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.
  • The page did not reach network idle before the scan window ended.
  • 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.

Brave-list blocking visit only

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

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.

Report ID
20260727-8d7b026a24c9cdcb60c53f57e644a901
Site
www.twitch.tv
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 .