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 0x7c26347e73cfd81635a165f4d53bbf7ba21f89e26d9f495c0aa8886c4310e76f. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f337542c-cc30-4f28-b7a6-fbd4cc13609c.json and https://artists.proofprofile.net/proofs/artist/f337542c-cc30-4f28-b7a6-fbd4cc13609c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).