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-2026-09-23.ots

2026-09-23

Merkle root8a17b50644fba137b1ea3749e015854d54085bb5d2560108d70e899d75279320
Reports covered97
Sealed2026-09-24T01:17:23.415Z
Bitcoin anchorsubmitted to https://a.pool.opentimestamps.org — download the .ots proof

Every sealed day

46 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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754b474cf0051b847b38b9d14c5d38b88ea60e988e00e955c0d8935d51a4226f
761f752eeae25d8160871dc9be86dba1e5757fc1a962a968c17d09640bd18234
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7e61bb834b4db19708fe05c0bfca0a75d91cfa7548f4b3d20f5e540ff77ab39a
7e8bb810bd6506f3fbbab16b00353712700c538a4c7158d2de35c1de8b125d11
7fa70b1672a04493d6b95198617e61720ce9adb9e0c0c1f3f46b745015ede196
8358a71a5724ffd8b00e0e31aa3deac08e08986217069c66dd51954474345be2
889db7a29b154b6d232b3c34a019bc640f7baf729da6422f6fb238e57ecf0468
8de09596589168d9ee1e209dc296f4287ac0de0bf6ada4d2209dd2fb0257f1d4
93b9e03fd40312a8312746435279c6a01803de11a968f3a4f9df9a97f3320ac7
9488eb152a24f4c690ea11443e39c4878a8298c0c8c027f91b4031f3cf7a61dc
9b61bd08ca01a45567b93e047d680b9daaebe9a655ce8f95dbbb2d2e13cfdb1d
9c1b3655f3fe17f3c41e01063fec08c8b861fffd3402417d0ae73e35139a37f4
9ce313d529d06efaa6e931f0846b251bcd69db36cb9ee29ddfabafff33a7b5fb
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