James Hann (1799–1856) was an English mathematician, teacher and textbook writer. Life Hann was born at Washington, County Durham, where his father was a colliery smith. After working as a fireman at
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 0xf1a63a34e4a85366c79fb82abe0c442f9e1cb6c109da1067de9efbb7567ae6aa. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d93bc66-86ab-4586-a3f2-1121bf29c45b.json and https://artists.proofprofile.net/proofs/artist/8d93bc66-86ab-4586-a3f2-1121bf29c45b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).