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 0x956a0abae37f062a5a0c0dd3f4e0d7813346cdfbf0b113c72f57784367608b59. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dcbf0cf-05c7-47d4-9433-4bd129672b4c.json and https://artists.proofprofile.net/proofs/artist/2dcbf0cf-05c7-47d4-9433-4bd129672b4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).