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 0x2a1e4a42c2ade983b4d7cb72c548abe6e36dd2bf03735f51cdd314e3b6a753d6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afff1374-66ed-4c0c-b968-e9048aee0d1b.json and https://artists.proofprofile.net/proofs/artist/afff1374-66ed-4c0c-b968-e9048aee0d1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Bolivian Baroque Celebration (Ao Vivo)
BRAZIL: Dom Pedro I, the Emperor's Credo & José Maurício Nunes Garcia, Missa Pastoril