upright=1.35|thumb|A coin depicting Offa of Mercia (757–796) __NOTOC__ Year 796 (DCCXCVI) was a leap year starting on Friday of the Julian calendar, the 796th year of the Common Era (CE) and Anno Domi
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 0x0924dca9ed06765f661784142c2df024f6574e0d3b9679ce2d92ae1300d4e620. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb7b4631-afe4-46b7-a2c1-9ef6e5e3224e.json and https://artists.proofprofile.net/proofs/artist/cb7b4631-afe4-46b7-a2c1-9ef6e5e3224e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).