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-2026-08-20.ots

2026-08-20

Merkle root66672fa45b11ee0bf160071d55fc544f7599e4086ad56b024b5841aef1c9867e
Reports covered186
Sealed2026-08-21T01:17:30.832Z
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 186 digests sealed under this root

015af268d08a24bc184310131a0a240af275a6a342e5a25dfa1b47ccb2aaca88
02f8e2f18568b25c858509d121baaeda0d12bdc78e1a3690e31e5f77c6a0ebce
0379657ee7f11cb6d779c53c2e9bc663857594058f7ecb61fe765bb16d34a03c
04c2f0d1222cf5bbecc4366c5f10b7cdaaf5f1d3db6a398ca32d2983b562aed7
0529a7b1680e8d5d46ec7386b9c9917c4e5a750a0687446e5a86dce2180efdb4
062f34581964600eb4543bcb5f0c565b9e1b109436e224f05bdf5769e008aae9
0a9b3d5e1e1eb7c719fc4cda78e913c4cb8dace53db0689b9cdb40e09b4399ae
0afd869cc11565fdfb038abd07aebe61e3b706b285c52647ed32528eb05e01fe
0bad560bcdca9a97b53d1ed5e8849ef9e6dd5df8737b3849d89d30fbfa5fae8c
0cdaa951b450f656a00ed72dd39a8a2962a4b4c626d345f3798736bfcacb54c3
11c9f61486e163883076abd9f254c3427b17594f385479d7e34bbb7d2958d188
1275076d7e1e6382b4af2bf546c7d22123cfdc993d2b8fc2616a4093764e38ae
13638d0ca74cff80554e9fd44708e19d247c1afd04556710b81318505e797649
13841502c186b1da8e866ebc76ec294ca234ce307b4bbf4c38102fd20e6d0982
16c1d1d699bf4194e11c90e9d7b572a3d346f66b7bb8088cb98ed6fb41a3b146
18e569e76a90ccd1e6341cd6a559d78350199e7cd0d95836a70371c937c5b903
1b2d9ef3dfbd0756f706dee6bd68cee7931aed9fc2c08ae65edf5b68521fd191
1c78af34d51c0a4caa6d6ce26dc5acbb26bda0cd3f2623f0959b5cfa3e17b0a1
1c8d944f4a95da6771846780db0d17c8f6d8fd3b0d601a8d35c96b4242cba36e
1dba72729d09fde7086ed3cea80556b82111985ce668407dcd0b5b3d1c50c649
1e049b38b2e39be8471308467814f1fbdf0ca537f9484e0383535677e726118f
20ff9cee86e2391310e5efeef09d7e29eb4840a1bbf3ced4efd10512ad9b1796
21ac8d7d4306f203394d292c62b946165568060e4940e4c2772cab40aa4eeab5
23327929f9c90ccaf343ef43c5d8ca9596a8de40ec6a4e7c18e2ec6549be4ce8
23eb937a176fae0bb54ac6b15c5861e310462b13a49f93c3b1580a1380f2489f
2431c8b4824f43c62bd2c25436c41076ce4c48a2f503151fe9d9062defc63171
2546d5c1e08f30cea6aba5ee18a500b79d93b4412bf9247004c1c0bda9967bd9
26d522ab06182e916fa3aa7d751db99f3d2f49c9f067b40d8da79d8927ca8b16
28b6158817195af9c5852706009f876895d2b0bd0dc4ec4311e0ea6b301124f2
2a7be65574e88500c38af599685663c5a49f44df2bebb4312ad6f70e8247e7d9
2ce483cb7b99daef12f8ea3ff778d7766b4f57a83e08a14707fb37ade479681a
2cfa6cfb6b7934e075d0b1a06d3c3b8bf4eea39d19907924979ae79e08e2b202
2f770c27d888b6f7e05c94cceb6e6f8bf47794969ae7cb8c1e3db0de63d400b9
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