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 0xae25476a099d5ab8c09ad0c6be42c6200e570ca85824fc5534bd927e9a13f8e9. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0dbae1f-c68e-48f1-8957-560d938d79a2.json and https://artists.proofprofile.net/proofs/artist/c0dbae1f-c68e-48f1-8957-560d938d79a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Debussy: Six epigraphes antiques, Suite bergamasque & Trois preludes
Ginastera: Concerto for harp and orchestra - Bach, Scarlatti, Faure & Spohr: Solo harp works
Ginastera: Concerto for harp and orchestra - Bach, Scarlatti, Fauré & Spohr: Solo harp works