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Website evidence · pilot dataset

Does yelp.com fingerprint you?

No monitored fingerprinting signals observed in the latest measured scans.

No monitored signal family met its threshold in the latest measured scans. This limited visit does not establish that the site never fingerprints visitors. Earlier runs remain available below.

Open evidence JSON ↗

All 4 source records are included in the JSON. Scan timestamps and versions are shown as recorded. The tabs show the latest usable homepage measurement for each setup. Later failed attempts remain in the history. Scan scope and methodology ↗

Inside the scan

← All websites

Visitor setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Page document
Scan time
2026-10-22T17:19:00.835483Z
Browser / scanner
156.0.8078.4 / 0.4

Captured titleyelp.com

CanvasDraws text and reads canvas output.2 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls

Frame: https://geo.captcha-delivery.com/[redacted-challenge]

  • Inline caller recorded
canvas.getContext1 calls

Frame: https://www.yelp.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent3 calls

Frame: https://www.yelp.com/

  • https://ct.captcha-delivery.com/i.jsline 49 · col 59
  • https://ct.captcha-delivery.com/i.jsline 298 · col 30
  • https://ct.captcha-delivery.com/i.jsline 299 · col 23
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

Static script signatures

  • https://ct.captcha-delivery.com/i.jsDataDome · 0 API patterns
Network and worker observations 16 requests
Captured scripts
1
Instrumented frames
2
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • ct.captcha-delivery.com
  • geo.captcha-delivery.com
  • static.captcha-delivery.com
Source record and integrity
Original source
results/headful/yelp-com-20261022T171900.json
Original file SHA-256
ea982d11253f361a7a91966634d744459c4d3f873269cebe0240306483364a33

Run ID: headful-ea982d11253f. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (1)

Visitor setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Page document
Scan time
2026-10-21T23:25:49.216000Z
Browser / scanner
156.0.8078.4 / 0.3

Captured titleyelp.com

CanvasDraws text and reads canvas output.2 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls

Frame: https://geo.captcha-delivery.com/[redacted-challenge]

  • Inline caller recorded
canvas.getContext1 calls

Frame: https://www.yelp.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent3 calls

Frame: https://www.yelp.com/

  • https://ct.captcha-delivery.com/i.jsline 49 · col 59
  • https://ct.captcha-delivery.com/i.jsline 298 · col 30
  • https://ct.captcha-delivery.com/i.jsline 299 · col 23
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

Static script signatures

  • https://ct.captcha-delivery.com/i.jsDataDome · 0 API patterns
Network and worker observations 16 requests
Captured scripts
1
Instrumented frames
2
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • ct.captcha-delivery.com
  • geo.captcha-delivery.com
  • static.captcha-delivery.com
Source record and integrity
Original source
results/headful/yelp-com-20261021T232549.json
Original file SHA-256
7676912615ad0483416c02059be867b84956c46533ee89d996696684d20478d4

Run ID: headful-7676912615ad. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Page document
Scan time
2026-10-22T19:34:27.729720Z
Browser / scanner
156.0.8078.4 / 0.4

Captured titleyelp.com

CanvasDraws text and reads canvas output.2 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls

Frame: https://geo.captcha-delivery.com/[redacted-challenge]

  • Inline caller recorded
canvas.getContext1 calls

Frame: https://www.yelp.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent3 calls

Frame: https://www.yelp.com/

  • https://ct.captcha-delivery.com/c.jsline 49 · col 59
  • https://ct.captcha-delivery.com/c.jsline 286 · col 30
  • https://ct.captcha-delivery.com/c.jsline 287 · col 23
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

Static script signatures

  • https://ct.captcha-delivery.com/c.jsDataDome · 0 API patterns
Network and worker observations 8 requests
Captured scripts
1
Instrumented frames
2
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • ct.captcha-delivery.com
  • geo.captcha-delivery.com
  • static.captcha-delivery.com
Source record and integrity
Original source
results/headless/yelp-com-20261022T193427.json
Original file SHA-256
fe6d65b5cda6614ad9428be752516ac482c8ef2383cd4ece961042bf58655a04

Run ID: research-fe6d65b5cda6. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (1)

Research setup

Not observed

0 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Not observed
Measurement
Measured
Page context
Page document
Scan time
2026-10-21T21:33:38.659329Z
Browser / scanner
156.0.8078.4 / 0.3

Captured titleyelp.com

CanvasDraws text and reads canvas output.2 API entries

Observed requires a text-drawing API and a canvas readback API. Guide ↗

canvas.getContext1 calls

Frame: https://geo.captcha-delivery.com/[redacted-challenge]

  • Inline caller recorded
canvas.getContext1 calls

Frame: https://www.yelp.com/

  • Inline caller recorded
WebGLQueries the graphics environment.0 API entries

Observed requires at least three distinct WebGL probing APIs. Guide ↗

No matching API call was captured.

AudioRenders or reads audio samples.0 API entries

Observed requires offline rendering, buffer reads, or analyser reads. Guide ↗

No matching API call was captured.

FontsMeasures text repeatedly.0 API entries

Observed requires at least ten text-measurement calls. Guide ↗

No matching API call was captured.

DeviceReads browser and display properties.1 API entries

Observed requires at least three distinct browser, screen, or window properties. Guide ↗

navigator.userAgent3 calls

Frame: https://www.yelp.com/

  • https://ct.captcha-delivery.com/c.jsline 49 · col 59
  • https://ct.captcha-delivery.com/c.jsline 286 · col 30
  • https://ct.captcha-delivery.com/c.jsline 287 · col 23
Providers, script signatures, and DNS 0 provider labels

Provider labels and static signatures are scanner observations. A library-name match does not establish that its code executed.

Static script signatures

  • https://ct.captcha-delivery.com/c.jsDataDome · 0 API patterns
Network and worker observations 8 requests
Captured scripts
1
Instrumented frames
2
Google Ads observed
No
Transmission evidence
Not validated

Legacy transmission hints are excluded. A request after an API call does not establish that the extracted value was sent.

Third-party hosts

  • ct.captcha-delivery.com
  • geo.captcha-delivery.com
  • static.captcha-delivery.com
Source record and integrity
Original source
results/headless/yelp-com-20261021T213338.json
Original file SHA-256
b7c8ab123d76b2d27aee4f99cdcc7323eab5ae21c8916c0fa7891939ba7057f8

Run ID: research-b7c8ab123d76. The JSON contains sanitized observations, not the original private scan payload.

Queries, request bodies, cookies, extracted values, raw errors, and session payloads are excluded before publication. The source digest identifies the original private record.

Read the sanitized JSON →