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 0xb0f4f1077772e8c84e5a69907ea3b5401114a35cfe52a00f2474ba2d985f50a4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8961d511-2267-4243-a269-e5d524654ab1.json and https://artists.proofprofile.net/proofs/artist/8961d511-2267-4243-a269-e5d524654ab1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Monteverdi & Gabrieli: Easter Celebration at St. Mark's in Venice 1600
Graduale haec dies es quam fecit dominus
Alleluia pascha nostrum immmolatus est Christus
Communio pascha nostrum immmolatus est Christus