1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a4e28c0c971d5078f99133f9081fb6b20e04203371076f4fd0d715be6f7a7f. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/288c446b-f91f-4e3e-b0ad-dd2e571cde66.json and https://artists.proofprofile.net/proofs/artist/288c446b-f91f-4e3e-b0ad-dd2e571cde66.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ave Maria Vol. 2 (Arr. for Trumpet and Organ)