1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506bfb7b7be472524ec9bc9d2e50e97658f10ae3c54f2b711865280bbf1634cb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc493117-ef8c-48b7-8d86-ba63773a2e53.json and https://artists.proofprofile.net/proofs/artist/bc493117-ef8c-48b7-8d86-ba63773a2e53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The World's Greatest Jazz Band Plays Cole Porter and Rodgers and Hart