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-2026-09-10.ots

2026-09-10

Merkle rootb70be949fdd8762d8b4a3aa03c643a8c1e84d7d2ff3011ed0edd56797819e44d
Reports covered153
Sealed2026-09-11T01:17:51.748Z
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 153 digests sealed under this root
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456f303dd21d0f75b842844ec3d1c9cd6c9d4d8a0c8218de1d80bf24c8c2fbd9
458ac275e619ae590767fb9dfb714dd1bc79ffbc6531774c7c7da55fb4ab7d4d
46b638290005ae0c0b9dcb1b3f8c434c77cb82bf102e9d682b03f1a03a87d713
46bc741510175fddbbe96c2165078d264358e7719567dc1045f6caeb69a70705
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4ceda3b1f0b44542ecd47145914c0f647ca4e0262dfd49612cf4c26d6f8bb803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6d54e472d65ebcc51063ed51ff926b832f73e83660d527756e126c03eb5ac9d6
6e06b4d28ed5bb5d1f6768bd06547d0ff411c525354a09321a1423b05ed080ba
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7995d932b15a00992f34992c0e4385bd4542eec63b15d862e82241dfe7ef7b05
7c8cdd5e150fa50fdf5943a6e7c0967f18c15d77892e5a9f857a101a778d0e18
7ce1e25799dc62c17a481aa8940a5159a0ada21c4c2ff35418b24ffcb8c3133d
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