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Website evidence · pilot dataset

Does nih.gov fingerprint you?

Browser signals observed; fingerprinting is unconfirmed.

Browser API activity met a monitored signal threshold in the latest measured scans. The activity alone does not establish a tracking purpose.

Open evidence JSON ↗

All 19 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

Signals observed

1 of 5 signal families observed

Canvas: Not observedWebGL: Not observedAudio: Not observedFonts: Not observedDevice: Observed
Measurement
Measured
Page context
Page document
Scan time
2026-10-23T00:24:48.455520Z
Browser / scanner
156.0.8078.4 / 0.4

Captured titleNational Institutes of Health (NIH) |

CanvasDraws text and reads canvas output.1 API entries

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

canvas.getContext1 calls

Frame: https://www.nih.gov/

  • 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.5 API entries

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

navigator.language11 calls

Frame: https://www.nih.gov/

  • https://assets.pinterest.com/js/pinit_main.js
  • https://www.google-analytics.com/analytics.jsline 94 · col 17
  • https://www.googletagmanager.com/gtag/js
navigator.platform1 calls

Frame: https://www.nih.gov/

  • https://www.nih.gov/themes/custom/nih2_uswds/assets/js/uswds.min.js
navigator.userAgent141 calls

Frame: https://www.nih.gov/

  • https://assets.pinterest.com/js/pinit_main.js
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20335
  • https://static.cloudflareinsights.com/beacon.min.js/[redacted-id]line 1 · col 20372
  • https://www.googletagmanager.com/gtm.js
  • https://www.nih.gov/themes/custom/nih2_uswds/assets/js/uswds.min.js
screen.height8 calls

Frame: https://www.nih.gov/

  • https://www.google-analytics.com/analytics.jsline 93 · col 231
  • https://www.googletagmanager.com/gtag/js
screen.width8 calls

Frame: https://www.nih.gov/

  • https://www.google-analytics.com/analytics.jsline 93 · col 219
  • https://www.googletagmanager.com/gtag/js
Providers, script signatures, and DNS 3 provider labels

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

  • Crazy Eggscript.crazyegg.com
  • Google Analyticswww.google-analytics.com
  • Google Tag Managerwww.googletagmanager.com
Network and worker observations 105 requests
Captured scripts
25
Instrumented frames
1
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

  • assets.pinterest.com
  • dap.digitalgov.gov
  • log.pinterest.com
  • script.crazyegg.com
  • search.usa.gov
  • static.cloudflareinsights.com
  • ucm-us.verint-cdn.com
  • www.google-analytics.com
  • www.googletagmanager.com
Other recorded API calls 2
  • document.cookie.read80 calls
  • document.cookie.write19 calls
Source record and integrity
Original source
results/headful/nih-gov-20261023T002448.json
Original file SHA-256
366dddbca66d44f65b3ebf3445ea3beae1037378ad440d5dab872417740829f4

Run ID: headful-366dddbca66d. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (9)

Visitor setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-21T22:54:06.034075Z
Browser / scanner
156.0.8078.4 / 0.3
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headful/nih-gov-20261021T225406.json
Original file SHA-256
5c043dbe97c555c43c38fab3de011ae47b372bea75f9de739610383253f656bf

Run ID: headful-5c043dbe97c5. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-22T15:14:52.745865Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/nih-gov-20261022T151452.json
Original file SHA-256
98f31a4f176fa9165c6007af02fd55f023f6d09d12b6a0b77bf07fafd9291485

Run ID: headful-98f31a4f176f. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-22T15:14:53.272863Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headful/nih-gov-20261022T151453.json
Original file SHA-256
5c858c06825567e3a5f70822ed116231e21dbab8aa911f28939134151f34ccf7

Run ID: headful-5c858c068255. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-22T20:46:19.516735Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/nih-gov-20261022T204619.json
Original file SHA-256
0c1c7b3246339374138f37e7b89fdad452fb6cdd93a16f53cab74968796df610

Run ID: headful-0c1c7b324633. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-22T20:46:20.142054Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headful/nih-gov-20261022T204620.json
Original file SHA-256
7c415152d46d16334804c14d7f060ffa8e856157b7a9de5b48eeb8ced0cb9339

Run ID: headful-7c415152d46d. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-22T22:08:38.195489Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/nih-gov-20261022T220838.json
Original file SHA-256
364d78736437505fe5b12e20e7a08c7dbc975a409cc3549af05bed057d0ed3f9

Run ID: headful-364d78736437. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-22T22:08:39.786612Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headful/nih-gov-20261022T220839.json
Original file SHA-256
68504a332b663704f4f80f9783d8154a5ba8683bcbc192f88601696bf35382fd

Run ID: headful-68504a332b66. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-22T23:37:07.471026Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/nih-gov-20261022T233707.json
Original file SHA-256
e430ce3c5519370b05f792e1142a098a118aaff2e1be6ce082b47e040b35c3ba

Run ID: headful-e430ce3c5519. The JSON contains sanitized observations, not the original private scan payload.

Visitor setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-23T00:24:47.941018Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headful/nih-gov-20261023T002447.json
Original file SHA-256
b4f6ed2df09ae1a96bdf98d70871167ef71d8c4870019e84cb31bc4c4b8e0a22

Run ID: headful-b4f6ed2df09a. 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 · Partial load
Page context
Page document
Scan time
2026-10-23T01:00:32.008272Z
Browser / scanner
156.0.8078.4 / 0.4

Captured titleNational Institutes of Health (NIH) |

CanvasDraws text and reads canvas output.1 API entries

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

canvas.getContext1 calls

Frame: https://www.nih.gov/

  • 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.0 API entries

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

No matching API call was captured.

Providers, script signatures, and DNS 2 provider labels

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

  • Crazy Eggscript.crazyegg.com
  • Google Tag Managerwww.googletagmanager.com
Network and worker observations 86 requests
Captured scripts
3
Instrumented frames
1
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

  • assets.pinterest.com
  • script.crazyegg.com
  • static.cloudflareinsights.com
  • ucm-us.verint-cdn.com
  • www.googletagmanager.com
Other recorded API calls 1
  • document.cookie.read1 calls
Source record and integrity
Original source
results/headless/nih-gov-20261023T010032.json
Original file SHA-256
f57b8adc5600e0d9cf3fafe8da8a4981faa9dc117a03dc14cda817f3e020e92b

Run ID: research-f57b8adc5600. The JSON contains sanitized observations, not the original private scan payload.

Other scan attempts (8)

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-21T21:12:22.142728Z
Browser / scanner
156.0.8078.4 / 0.3
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headless/nih-gov-20261021T211222.json
Original file SHA-256
a75bf774869df54deca16d5b10fabc6a9d3a32aa6e823e8bfeece97d405d951e

Run ID: research-a75bf774869d. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-22T18:39:02.502553Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headless/nih-gov-20261022T183902.json
Original file SHA-256
beff73628c83a61c4f81e66df3bb5af2cd06984ce48060777c3765648be011bc

Run ID: research-beff73628c83. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-22T22:59:00.971879Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headless/nih-gov-20261022T225900.json
Original file SHA-256
0a5b83b34f1d34fdc4e3555400ceeaf3e298eddf0c223fed1839a9baa8ed91c6

Run ID: research-0a5b83b34f1d. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-22T23:56:50.966214Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headless/nih-gov-20261022T235650.json
Original file SHA-256
a003ab93019e4b3f30ea8bb79ba7a19d9e4d23a4173d0517ef6226d131b4e4c6

Run ID: research-a003ab93019e. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-23T00:26:22.915246Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headless/nih-gov-20261023T002622.json
Original file SHA-256
151eefa86d679c38ec7de3125f7f052725ee1bc04d86f0987d1bd576ea0a11a2

Run ID: research-151eefa86d67. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-23T00:26:23.037517Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headless/nih-gov-20261023T002623.json
Original file SHA-256
fc7bc6a57e3f0f5c8a41232fab2494bf4b256f9a65d3b96f624d063c9dbab149

Run ID: research-fc7bc6a57e3f. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Navigation failed

Navigation failed

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Navigation failed
Page context
Page not measured
Scan time
2026-10-23T00:41:15.840057Z
Browser / scanner
156.0.8078.4 / 0.4
Navigation failed — no usable scan result

Navigation or page loading failed in this browser setup. The record does not establish why it failed.

Source record and integrity
Original source
results/headless/nih-gov-20261023T004115.json
Original file SHA-256
81da69a2ce827b87aecdbf968b8de418b99fc4545fca536aedc30e91623998d9

Run ID: research-81da69a2ce82. The JSON contains sanitized observations, not the original private scan payload.

Research setup

Scanner error

Scanner error

Canvas: UnmeasuredWebGL: UnmeasuredAudio: UnmeasuredFonts: UnmeasuredDevice: Unmeasured
Measurement
Scanner error
Page context
Page not measured
Scan time
2026-10-23T01:00:31.918760Z
Browser / scanner
156.0.8078.4 / 0.4
Scanner error — no usable scan result

The scanner crashed while collecting this page. No usable API results were saved for this setup. A fresh scan is needed; this is not a site-blocking verdict.

Source record and integrity
Original source
results/headless/nih-gov-20261023T010031.json
Original file SHA-256
ce0bdaed2b3354f5dc3c1c603a839acf23fdf23fd9ac34e0efce3e0a0283063f

Run ID: research-ce0bdaed2b33. 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 →