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 0x8e5867b4cf1260d420f5a9b32cf2129bb753b62432a568a8b3b5a798885f14bc. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1048dbef-01c7-4bee-af05-a3a20a1ca08b.json and https://artists.proofprofile.net/proofs/artist/1048dbef-01c7-4bee-af05-a3a20a1ca08b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Works by Hindemith & Ibert & Bozza & Haydn & Beethoven (2023 Remastered Version)
Poulenc: Sextour - Francaix: Divertissement - Milhaud: La cheminee du roi René
Mozart: Divertimentos Nos. 8 & 14 - Reicha: Quintet, Op. 88, No. 2
Toch: 5 Pieces, Op. 83 & Sonatinetta, Op. 84 - Cowell: String Quartet No. 5 (2023 Remastered Version)
Italian Woodwind Music (2023 Remastered Version)