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-2026-08-14.ots

2026-08-14

Merkle rootae7775b01ab8545fe5f495a61cd7948c60ad0c04054760a2f13ab3056acb0df7
Reports covered105
Sealed2026-08-15T01:17:19.578Z
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 105 digests sealed under this root
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36cac2d22c534963af8b847771d928f243139c90f1a90d4a989ea45ade3d139d
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3d06caadb4679c853b8400c26409ec5f655d72d974a17015bf6e7ceb82024bb8
40bb96457ca96286c5e9f7df1e770b2a46106604eb735d25dfdc5d7d5a803b65
470634a6d89c9e86450bb633b1921af62c2189eee95893ea84f9a004c86ad2b7
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492abceee848bba50806b99db94f9a85f5354b28287cc48f8b6fc38744ced952
4a5dba6b2201a01d5e640f717914bc9426975fa8e1bc831ebd2b53594582c02b
4b20bdbcea628e418b3fbf69a8a476d031a387010ab183eed680349aed1001bd
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