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 0x702b1b52eab20058b4b7d4f098d28bc3322b0f3b2f04eea6d7dfb1f3d2084834. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe17604b-c3cc-4998-b3ae-35ec273e01ee.json and https://artists.proofprofile.net/proofs/artist/fe17604b-c3cc-4998-b3ae-35ec273e01ee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).