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 0xf670ebf2fc75c21895802ed44ce080b6af6d9bfa132fa91243d6652d1dc68fef. 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/f56bd4a7-5f16-49f8-8c51-83c2470a08e2.json and https://artists.proofprofile.net/proofs/artist/f56bd4a7-5f16-49f8-8c51-83c2470a08e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).