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-2026-09-17.ots

2026-09-17

Merkle rootc60446f07a7546283da00e2f46fc6df7d4b73190b4e362001cbac2258cd86606
Reports covered113
Sealed2026-09-18T01:17:06.502Z
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 113 digests sealed under this root

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07a1388595c0d093ec0235f1c2ad3e1696fb7c7eec3b2129ec7bc87dde21689b
08928eba6d91c5bcc5255cb96efac51d2ecd34c2ff1ea72b9aee163127d56690
0cd9f63fbd905300d54fc3ab37830f70fb6cfff9ac6e653a778cdd7ceb5e9cfb
0ec1eede9cd2d2168db995a480080dea63ed279a2091e80a61f6eeb5ae024bfa
107a97b416e7d2d07ad5e85e9d6e12ba1cb4211eedd956760601432ee29ac1ab
165ea275e18337d56226e465b957ac0b5395df8e74aed4a9de5f58e9d0723669
16b8e009d9606c308e32a65c3ebebad2eb7fd1dac9602d2137d0bd9219e0c96b
1ca13bb89bc55626b73f17eea835c1c7ee40a94ce8e1e5e1213b9598a64c5c4a
1cd65dca23df81966fe170370f480c8f9775e71712e845a064a5590e7c775211
1faef13848046ec7c6b87e8a9ac864f6a063dedd46e3e2e0b3ee1f0765597fe4
20266ce8c4369eded46285bc761b8c38f9bbf47573c3cb03e2107aa5e3018f50
243e52f7b83113d7f88a98393b6c899a3d18c7f6311da9f5a54f5a889ea3452d
25d6f1cc8040841ec5b03aceecd27c1f41311d9135446e844b41a68048416fed
25e62cbef4fc1f617a286940075389b58dd23380187722bb588bc1fb65501b8f
260f42a82ff1be9dd6d9dadef8d5c54cb3f1ff48e635f2d64823de67ac0241ef
28f4e520562a9f484a741696cb638b9912e8944395e09b8ec79f8c1b67720741
2a69d3b36084eb7b1af3ba032ea53a6df07a3483d8c077271838212b8b6dbfc1
321c138fca5825505b5235c1a5e5c6299ebdd07454d9521aae1451c2635fa031
3308c14e48c3a9b21a95585dd9631dfba7b92d42b379923a0362c1bb4b4982bb
335e7081231375d3221a7d3b04e275fee4ef8601d66ad5d1a169ef5fd0c93bc9
33de49f67a1404efd018266e80d0fc4af1e203f8d5455f5d01611bd6e4837135
341b875dea2ec42712a4a9736daddd8b24c188f27058b5377598c0aca6837c5f
3584459a79c51e343f253d2433b8345a381ad306b88d0f30dd2008cdc89afb96
38745aa349024f402ac1b0ecce267dbe0d57d361d90aa40bb5fbc9c78af92cc7
3a369be158cb4b7146431ac4d3fc55aeb1c629f6193c65604ca95d9f003c006f
3ff193531376c99d46d64022a557c8a98cd9fcb966bf141fbe8f5dca12bfacb1
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4a4d21fee904bfab95a4fe5c6c1f73feb5f7afbb0f53de57678cbf7b059df8a7
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50179abdf21c66994c6c3fa1078567404fa207fcf21901c6d0ab239dc22c7584
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