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-2026-08-23.ots

2026-08-23

Merkle root0dcedd97f9038b9e0e65fb198a706d40b80b192a99adb15d445e900cbde15fda
Reports covered115
Sealed2026-08-24T01:17:36.457Z
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 115 digests sealed under this root
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7a8027ae07ca87582e0c50bf0bba03ae1931a314c1f211061f4da8a80f4e1b74
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8c5819608ced2dfeca1aeecc2c36f75049ade5df52e437c4d16ca6784477db02
8e5b91af852ad778f3abc9b56f01530a89812c92c173a426b745f986493d456e
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9a12158f18a882ace05b2f4a0f6e70fb683fb1b882184d88af787c1d0b1584ea
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