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 0x67b852cee7fa6c49e424c40b7cc10940c133124268fda034447341f750a54d85. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd24566d-3ca7-41c9-a5ca-99b10da01603.json and https://artists.proofprofile.net/proofs/artist/bd24566d-3ca7-41c9-a5ca-99b10da01603.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
John Crow by the Fire - Side (Bonus Edition)