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 0xae95c1ca860a7dc60749a07c3ac0dfc7713ca58bf06a5bd12a18e1633a41284f. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c8f70d2-3802-49bc-abec-b0218f3a64f3.json and https://artists.proofprofile.net/proofs/artist/1c8f70d2-3802-49bc-abec-b0218f3a64f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).