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 0x2c9cedb6e01db3c468cc755e58b853e5134db2c6318f48d47408223b500f1007. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76c9b8db-d642-48cb-a6f7-b40f392f68d6.json and https://artists.proofprofile.net/proofs/artist/76c9b8db-d642-48cb-a6f7-b40f392f68d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Heart of Saturday Night (Bonus Track)