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 0xa65e40868cc0dbbbada24b6380f9236b22bb4851af7e1616511935cfa474807f. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0266e1de-d706-4784-a151-c9eddcd14f0d.json and https://artists.proofprofile.net/proofs/artist/0266e1de-d706-4784-a151-c9eddcd14f0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Marienvesper (In Festis Beatae Mariae Virginis)