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 0xfdaeb1e8c987540428a1ec8dbd97bf0c6cda6c3fdee3973f54e530568fdbdcd8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd6001c9-7b7d-4ce8-a6a6-f56ec6f6c6fb.json and https://artists.proofprofile.net/proofs/artist/cd6001c9-7b7d-4ce8-a6a6-f56ec6f6c6fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).