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-2026-08-29.ots

2026-08-29

Merkle rootd858a0f2a63447b9ec1ad137f04d598f8373ede98c2e68fd984af453884dabb2
Reports covered97
Sealed2026-08-30T01:17:47.132Z
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 97 digests sealed under this root
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741caf67c779bfdc8c2f224b93fb305971ad13c4a7eb11ee9cf68fd27656eb31
757d697e38191f46e5437f2a26cd35985273727918fcd284ec1e0abc28edd3b3
77c587687d23ae402156fbec4a8b68a2c1fd40761cd16011a3317ae75a4acaed
7e13f170e9a8058227693cd11a1c4bca0228f36f662efe59927d8adf2077f3d1
7f6783585b564c2b0fef6719abaf43f56fc8c29852d57ffb91b03ee3605d46e7
856c4a7f5690e9e18caa436d83eb743d832fb989d30c7ed257384f74fb6456ff
8bcbe0860de1bf30f165f74cce76254ff4880c2a601bbf46a3281d6b5c27a168
8cad6805fcfe7085eacfee9d35a61154796c97507cdb4d17ccaf28a57cd60146
8d10fac6056a9598cccdebb00ff172fd52a7d7bc6f20b6c996a06639588db5cf
8db07e29e4e519772e6d35e0ff63d584d83b5c2bc4a047d0c945c2fc28a5fedb
8ee17b880059e201cd170c089ecc3118e137432ea6c6154da636484c9959e125
91a040001d1274688288f48f92ce6f7b2193c14eec5b8f261f2308d5e465c41c
925996bcc0975d1154cf159cfbf1f743e4fbe514c742ae3649fdf41ef5471c53
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9e18a5afb2d96a4b128ae10b665495acac81b9caefc88ed67a43ada62fc54a5f
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