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-2026-09-04.ots

2026-09-04

Merkle rootc9ee422fff056f87f03a59534b1ac51a2f6ae8808c3dfbfc25ff746d018dc74b
Reports covered87
Sealed2026-09-05T01:17:38.949Z
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 87 digests sealed under this root
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63410c3e5a319cc7a99953472b580715991e3ebdca713b35057feb9db54a72ab
6b46c6274e35a64b8ca5d6528ba971d8f0b81316917ac5e210ddd593c434e3e1
6bf1bcb895828da77a042b9f9eac614c645f46a64419973147d98b52505740a7
7175f3c665fd66b94e61a99b5a2bce513ce4082886c63e041d661f181e1b8406
7256052b8515ac0afd354e8969b6ece8b4192767f315d22d660421f693bb3d0e
7698f6a083994d2b0d7e4ba602e2fde654fa2ae62e8afee27aa7722116ffb00c
769fece50a498ffc2b6c2f3b3ec574f9124efb1affe5b1f824491bc8c173abbe
7702e0fa877e925bffbf2b15e7fe79a686cb8161619953c42faffe076ad0351a
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855c923b38bacb97364e829b65df3ea7bb70a68a4ddddf0b77bac134a1ca35de
8747a487227453be59aea0898c3fc15af3a3fe36299e8f6a76926a8211b04ecb
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8c879bcee8f805f7c01b2a7846d0063e385ce751c943f7b59faa8e5b49b038ea
90b4716437ea3bcc0d9ffb2ae94dc18fe32ba2f1e0d46e56aaa3715857afbd96
90fd8198afc3bb53c1c744be8cf204faeb92fdd62e3c78de0f1b32356649b77c
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