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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafb5dfb822ea787be77ce7107c7f4a01f06c5110a9610ce0709ce0a29af4134. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d18037bd-0aa9-426d-964c-ee6f7bca2f8a.json and https://artists.proofprofile.net/proofs/artist/d18037bd-0aa9-426d-964c-ee6f7bca2f8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weber: Invitation à la valse - Schubert: Ouverture de Rosamonde (Mono Version)
Ravel: Valses nobles et sentimentales & Pavane pour une infante défunte - Falla: 3 Danses du Tricorne (Mono Version)
Stravinsky: Suite de L'oiseau de feu - Khachaturian: Extraits des Suites de Gayaneh (Mono Version)
Prelude Op. 34 No. 14, Symphony No. 3, Concert voor 2 violen en orkest - Vivace, Etc.