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 0x30cfa27c7e211039a42a69015225c3bc635d54d520a2f6224c715c4c244ffda1. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b116924-97a5-4f46-b390-7b2f0f6b104c.json and https://artists.proofprofile.net/proofs/artist/4b116924-97a5-4f46-b390-7b2f0f6b104c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mużika Mużika (Festival Kanzunetta Maltija 2021)