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 0x6e76c0958fef3450abf74e38266beb6d14c07d50d7fe7b5bcc4698d188c687aa. 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/bd51c6a1-fea5-4d8b-bedb-e3f2cb95b30a.json and https://artists.proofprofile.net/proofs/artist/bd51c6a1-fea5-4d8b-bedb-e3f2cb95b30a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).