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 0x5cc69920ffd4987e6262ed9d1537f7569b4691b19ec8c4b085a8f7839369280d. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9baa37a2-f56a-47f1-8954-c03a9239f70d.json and https://artists.proofprofile.net/proofs/artist/9baa37a2-f56a-47f1-8954-c03a9239f70d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1960 - 2010 Jubilé musical (Arr. for Piano 4-Hands)