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 0xf7b270d18abb7f6a07e1b0fe5b5c3b7b2b03928ffc6b08c19f4a021b83c82f43. Chain 2 (Bitcoin): anchored in block 954035 (2026-06-17T02:39:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3cea6848-cc46-48d4-908d-0c38e2b03080.json and https://artists.proofprofile.net/proofs/artist/3cea6848-cc46-48d4-908d-0c38e2b03080.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Doin' the Suzie Q (Original Recordings 1936 - 1940)