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

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.
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.
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.
Anyone verifies it with the reference client and no permission from us: ots verify -d <root> crawlcheck-2026-09-27.ots

2026-09-27

Merkle root	`00ac098c43566faef8f0302da80ed611645fdb9fdd1c94ef6be795fb9695748a`
Reports covered	208
Sealed	2026-09-28T01:17:40.258Z
Bitcoin anchor	submitted 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 208 digests sealed under this root

006551051e25db86392a1ece3a023844917d7c334deb069ea5e638e5b0afeaed
02915a512c5f0f08532d25badb9c4d5e7e027756045c0939552952c8987ed197
047d254e624be0009abc4628866ee3f4e7bd88a172c472c53199bbe828f042f3
067c029a70c71c290f26ffa12d32a515ab95f41ea19270a64f0596d2c7d3e1ac
0886f76ba727ce8af33bd33bf74ea0d669ff1bf8e3cf0c4b34c19fc59b709106
092aaff4e4090ce532bb95a10be117cb8a26715ee7aa0b1cb693e7b5231cb5ed
0bafb35c5388f22100f0440d734f02b06bffa9b4cc1f64976e37edf7ea8426f0
0c9f8733701f4ebf7ccb24d371079330d7c127a2d8c126adb760eb6ef5b4301f
0f9e302674f6ec7f7bf9147d38482d8c36d97052af0242549a2cf9fc82b0ecbf
117d2b7f812866b43fd1a38bf4dde156827be1afcd8bd3f6c4a665875eb7587a
12158551a57c330e5937dd5b14ddb00ed167ba5e2f3417d1f26c2d64442773df
141e70911e9d98bafd8e7add60855c5de8c0a702a84136d0e5f57c3188258d90
18cb43582d59a984fcc6eb158a6cc1eb49d0d396b6cac883565732af15b5caa4
191ad79e59f3c84bf65163e7b0919873f561d54c344d6d484ad815320ce019b1
1b08697e6b59586cebcbf97a539fbeed10f3f1ec2fb426fe0b5d3664282d84aa
1c27462f907f61797f5301e54878cbee29d3f2c02a6677ce230fefe1cfab3cd3
1ccd438a40ddd48c8c046b205aa0e526a19f81f7c9f4c77b11e663dd527105ca
1d4d9755e4f09e759fdf1be17d2077af651aeab2a03028532288c710051b8e12
1d625f0c3fa8df81f4de04a644f13e13e12c2870fbead7680955fb8bd6d708e1
1f20d48c0d02206b2ed9104fdb0b232c27dc4f455e3489452d4853189bab8e43
1f373f910ea8152f0c25f3d1671c2476c64736a2b41059f4f1ddb11d204718a7
212e6c1651066c48f9e47d270761bad02bcec9281f27f8ff22095b22e19ef5df
21cf43c97d4b547e1e92342b92f269fbed0bd0f5b521db1ce76543a9ee94e43b
2217b4f4df78bde67b1cd57ce36475e4281348eade73dddd678800ec78c5d259
23f278bca1b28b21e865565a73a670d99394bbb954e8703e5d893ac059f69605
256715213fb4fc0aac1b08d6538e1174f13f83c33ec30efb6823ca0da5859872
2884d982be8496349b0d05fc29790b30123dad53ea72d9f89ef041b7aaa98d88
289c54709782cb7c223a4d5b952c09472e4a1b13046dc067b1afb9681007e41e
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2f8834c8e73c433ede224a601d2c7023d4786af87833a393cbdff6a91f375a57
3003a012dbe2bd59e153b260954b088c02bf5599d3a74524948bed52c8bc34f9
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