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 0x1ddcdc1841020b2c028b96edfd0f08af4011fb9ec9f9bd6886b0eb9a6ab397aa. 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/c20dfd66-1a6c-4d25-a363-d300e9c6b462.json and https://artists.proofprofile.net/proofs/artist/c20dfd66-1a6c-4d25-a363-d300e9c6b462.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).