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 0xdf399f6780247330dba0f06d6e75eb5b290264b1691bf2593067b51e7197b829. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbcbd8f0-4af1-4505-adf1-c3a0b6f7f31c.json and https://artists.proofprofile.net/proofs/artist/fbcbd8f0-4af1-4505-adf1-c3a0b6f7f31c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).