Peter Wynn Barkworth (14 January 1929 – 21 October 2006)The Daily Telegraph Issue 47,338 (16 August 2007) p28 reported that he left estate valued at £2,256,862 and a collection of paintings and drawin
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8124c136aaa365e841d738bdbd8257394c6e751bdf4037898d7b377a0aba87c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dec6e3e1-fe75-4cac-8cd5-02a44acafd75.json and https://artists.proofprofile.net/proofs/artist/dec6e3e1-fe75-4cac-8cd5-02a44acafd75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).