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 0x1581e17eecdc20e9c59308dfd26bc1f0cc87e9588cd1144bd6e4ae808e23b535. 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/c57bbbc9-2b5a-40cb-aa87-18670d1fa3c3.json and https://artists.proofprofile.net/proofs/artist/c57bbbc9-2b5a-40cb-aa87-18670d1fa3c3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).