CrawlCheck

Timestamp proof

Every report is fingerprinted, and each day is anchored to Bitcoin

A report is a claim about what a server did at a moment in time. Until it is anchored, the only evidence that it said so — and that nobody edited it afterwards — is our own database, which we control.

The citation state is inside this digest too. The names, the phone numbers, the address, and every profile the site claims — with what each one answered when it was checked — are part of the fingerprint. It does not mean a directory indexed anything: no timestamp can do that. It means the state of those listings on that date can be proved rather than remembered.

What this proves: that a report existed in exactly this form at that time, and has not been altered since. What it does not prove: that the measurement was correct. Those are two different claims and only the first can be settled by mathematics.

How it works

  1. Each report is reduced to its measurements — host, timestamp, section scores, every path and status fetched, every crawler identity and what it received — canonicalised with sorted keys and hashed with SHA-256. Wording, layout and section copy are excluded, so an editorial change never invalidates an existing proof.
  2. The day’s digests are sorted and folded into a Merkle tree: parent = SHA256(left || right), an odd node paired with itself. Sorting means the order scans arrived cannot change the root.
  3. The root is submitted to the OpenTimestamps calendars, which aggregate it into a Bitcoin transaction. No wallet, no fee, no key held by us — the proof is a file, not a coin.
  4. Anyone verifies it with the reference client and no permission from us: ots verify -d <root> crawlcheck-2026-08-28.ots

2026-08-28

Merkle root73d9c372f7553967a72493f1a31af77f2a692838ae9c216b1b4784d37b4f2ffe
Reports covered98
Sealed2026-08-29T01:17:42.297Z
Bitcoin anchorsubmitted to https://a.pool.opentimestamps.org — download the .ots proof

Every sealed day

39 days anchored. Each links to its own root and proof file.

A fresh submission reports pending confirmation until the calendar’s next Bitcoin transaction confirms, usually within a few hours. Run ots upgrade on the file after that and it carries a block header attestation permanently.

The 98 digests sealed under this root

02a5605bcad8c0af1fd0b307616f9309c5971706fcb982748cfba70782dd6375
032fcd4948cf31044a4e5c798ba3fdeb70ae29ec86cb60e63ff5e4003834206b
053cac96199d0971df400317b964afcdd2349e5c483759ca5715f9f70b1c7aef
074f68844d3c8f0732b3fd627b94fcc64ddc40e8a512accfd9c9dbc30cdce81e
08d210a4681e898557df1cc5362a443712252b1854eff4b49588d2d83c99cb2b
0f2878ef132d4a749d5c74889c5a9c28f1a76bba67b462c61bba2c93c176e0b4
145b9ae6054d868d07594fc281f1a4e585756cc3facd4e17ae4435e85d13e27c
152d8299abe7066f39dcb1bb98c9504bf7742d192987f249d5b67441ee49df67
16a56101cf8fdde260a69fbbf90b411a361cc5375d4fb7d2fb08ea723b94423a
1878fb997dc3ad623ebe177de80f67e1e7ad277f24f5f4b30c2a47513a5bd162
1ac2ef0f31d2381c55b149cdcdca4c080fef351425a7b90193b74cbfcf50de31
1fb78f35d52568bb2af063799e802d972c165974007df2d618f0e05133cc646c
2022a2f61491f6f62d3e39da637d05595d44f582d189568dbb3cca5f569a0aba
2eeaebd995548d5572c39520e332c7f9ddd71bee3613d4a69f5e920c0d99a4ec
3147235b697f16a3ff6f5716303f1ecb62ca72eba31f3cef682b33921dcd1762
3539dc58d4806526d47ec796c3f5da26e548e3584321eb010b7bb45054031d54
38857b7b59584dfb1e64e0ed0f8d5e08d7be8245bdd5d39bee97db3d2522894e
39faaa2f9b7218e048718a037cce64b16b1b6182b3ef904091549272a293b1e2
3c1eb51bf72c211bd80f79970e9d011c7092979f7a8518a1fdc32a124ea89f24
3c9f4b8de1b5a9b887dbbc8a12159f2432723feef07d2b0438150ea84a937ecf
3f9eadce294b6b573994b665eae90e1d1eda9dc66648c5ce90a664b30442cdf0
40a680a6fbb146a0141bf4cb2e90332fe712f2f66defde15b2ab0c51b2f1f950
41e3c6e6f5e399fe63dae08e29b39c085ba5b776494b5eaeefd0cb25d11f8466
46cba73eb18c4c7de4ca60153970b170031c58e88ea1fcdf3a9b3c986e2f0769
4cd9f9824184210e375fc35ccea915aa169ea5be7cc48ee4c93b5711737a8adf
4d0b0cd0d4f4ad9a5cb0cf9052502a5ee722c8add4a0f3d458cc73ff152417af
4da242b30dae253efaac600d68580844f6be5374c8bc889d9f04ccff97508696
50c8fbfb9cbabc52ce143e47e79ef51566813999fe22f22fd0f96b5fd6b66b78
589df3a5c6f2eb40658c7e805b2e9f75a851d956a0387b98c5df9c886c24649c
5cc9540a64a3abd60ddd5ba013d9347b68d48cb559a6dd93130cafbf0212ccfd
5e17f509aa93f6bc9299aa038578bf001922727e4d588797e604096627f0a6ae
5efc0fc5d6527b0b49168313602fbc9ea960656950b4e758c3b065f003846eaf
60cd3c3df7c31846fdc97133529e70c0fb8163721f485c8e125b0908d7825fc3
677b9593deb12bc8abfbd155edf619637782798d3ea91fa9d07b7b44e5d78470
6783787447c0f03c6207d3f9a2acbe3f60c626ba6520fc32e8cbe5d5b7171f43
684d2893be7e0c34ad815428ac5adc53ec8c791506040925aef19b4bdcd1f409
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808f9e2f2f538a73b9aa7e1243305784de352ba573ff63ddc9c90fe42fb31694
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