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 0x1531abfdb09a04bd187e745a653c39fbdee007ea06a7cfa8610be28853e65a20. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f42ca38e-0e6e-47ba-bedd-ce53fc78e33d.json and https://artists.proofprofile.net/proofs/artist/f42ca38e-0e6e-47ba-bedd-ce53fc78e33d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart Era (Meister Der Mozart-Zeit) - Kraus, J.M. / Naumann, J.G. / Salieri, A. / Rosetti, A. / Dittersdorf, C.D. Von / Gluck, C.W.