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-2026-09-06.ots

2026-09-06

Merkle root90b4f3a88e2aaa02070a5b4d7f235ec5fb0cacb883370d0e7b4e0a5a76cffc1e
Reports covered92
Sealed2026-09-07T01:17:53.652Z
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 92 digests sealed under this root
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5c8c0d1dda5c68599aee2f70dc772f9af5d660efa670241b16feafa607179da0
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6975ddfba4e9fc85d363fda7ddd49e1552b75e7705e0710c7a950577cacb2dc2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8f3399a7019e1ec83880132931c5155180b1dd06eee1f6d2721f95b53dca806e
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