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 0x0cd33c8a792136b9a5dbb12ca9b5dd915e13ba1d6b8fa04f40e64720eee1ce29. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6248d3a7-2a71-4bf0-887e-4c51e12f838c.json and https://artists.proofprofile.net/proofs/artist/6248d3a7-2a71-4bf0-887e-4c51e12f838c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).