thumb|Maurice Emmanuel in 1930 Marie François Maurice Emmanuel (2 May 1862 – 14 December 1938) was a French composer of classical music and musicologist born in Bar-sur-Aube, a small town in the Champ
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 0xf1888e1ca60b64acc5be67b19e4b83d6b2062bcc89475d0b0f9488743eefa576. Chain 2 (Bitcoin): anchored in block 953943 (2026-06-16T11:59:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20e148b7-b7d2-4179-a60c-bf437fb2f64c.json and https://artists.proofprofile.net/proofs/artist/20e148b7-b7d2-4179-a60c-bf437fb2f64c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).