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-2026-09-12.ots

2026-09-12

Merkle rootc93b3a851dab6b47eefe0f6d764eb59cdc51555b0bbb72115fa9318f9c71bfc3
Reports covered147
Sealed2026-09-13T01:17:52.076Z
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 147 digests sealed under this root
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3a8cbad6f99a24c4941a053b784946f2942c7e5e9f91c2b1f5891dc6f0858795
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4bc042a21feba92eef9859f58d58dfd514cce49f1dcd8d6b12dce17fcad85c45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