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-2026-08-26.ots

2026-08-26

Merkle root79e848296953586d77cdb540a898f5d0669e289de42909409c70236e831e63b1
Reports covered176
Sealed2026-08-27T01:17:33.999Z
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 176 digests sealed under this root
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34d9ac0e41233f257fb1ff6c719ab09258708a88ec33ba0ec19bd6addda0a3c8
36f2f3756ce66c6cf6f2e2d230613254c2b4fedcc6119d5f2cc449cbb2db6920
3766548c9e5147b37ec7a202d2cf7c4fcc8be03e1ad31468dc2d0aacaf300141
384f7ded7c3e648fe80ee347932c8dc943f53d1944c9487ff5bfd2a7bdbea161
39453871f8fb8ed3dd6cf7e8b3e9f885af5d0dfbb49ccf9dbd77ba74c1033767
3b4e72efebabb656f8adb517dda8c8c55d52766abcfe0626f4007115a8281c8f
3dd4934407b731de55495cc5c58d093a8ba1fc1e4a9d0af77277c778ad5c5443
3ea1ea6c0a096522f696c10bd9966eb86fc60fb657dae1d43d4176829c6d6c17
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549cb5b3b1d3c346b0c4700c534f4b17d17cf3428241ecc0a2a9f00d6f2f2cb0
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