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-2026-09-15.ots

2026-09-15

Merkle roota338c6e7d6ead3d49bc41571f8b3e6ff6190cfffc2a095a58ad66acc22e36e80
Reports covered118
Sealed2026-09-16T01:17:03.498Z
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 118 digests sealed under this root
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413ae98cb60e5b30bade4b27c3a75ead2cb2bccd860e568558c45ff4e8cd4805
416e28497150543e057389936732afc87be59d5c3cc4c3142427feda9307d036
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5d77efd3c91dedf3c420b9ce0bbb09c3f27924472f9c804a8ae5fd991f9d5b3e
61a0201edfaf647dc6a76306f415017ad64fe16fa43340a3960801fcb1779344
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661f1591f786ece3636ee09ab4fbcc32a979d5812c01b9aff79a2fdcee5e9326
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72e844f23218eb99b2a70d1997f4a7bc87d54cbdcf9f45b91ed12f1b18d76c8f
760d7cd2a1badb27396e603e4261f6566c2d3c503c83ba38859d9dc7b75bab5a
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