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 0x9785bb631f1af8d44e884a259b1d3e292344425151cd1259c89d061ebd821d40. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f488e10e-58fb-4ce6-b663-c747e26f078e.json and https://artists.proofprofile.net/proofs/artist/f488e10e-58fb-4ce6-b663-c747e26f078e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
French Piano Trios - Golub Kaplan Carr Trio Performs Saint-Saëns, Debussy & Fauré
Mendelssohn: Trio No. 1 in D Minor, Trio No. 2 in C Minor