Jack Walker (19 May 1929 – 17 August 2000) was a British industrialist and businessman. Walker built his fortune in the steel industry, amassing a personal fortune of £600 million. He then went on
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 0x30c5b9dfe00db6eaba1acfc300d966a5430b129714ddb13b686d6e5436e4fc8d. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6df1b1b-f998-46a6-a7bd-ca238b1d1c98.json and https://artists.proofprofile.net/proofs/artist/e6df1b1b-f998-46a6-a7bd-ca238b1d1c98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).