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-2026-09-09.ots

2026-09-09

Merkle rootdce9a6c682b44c591254f25ecbc3c39009d9941699c1f9cdffff1f963a8841d9
Reports covered142
Sealed2026-09-10T01:17:41.711Z
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 142 digests sealed under this root
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396083981a0b201840f4414cfb3c2495051968621ea8dae51076ec7edd721d66
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5ed2a3e8163a5910703c3b8896cffbd8b7883d38133cfa9373399c8945060008
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601ec0f5c6d136e9a6be7ccd39c30ff815e66c607abe7aa6a006ebcb941958c1
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