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 0xc779395e863684b00f9b519d3cfedb728136dc538bfded7f47c0d005a2948a8f. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6e2a615-678b-4300-9e84-6eb3d112c419.json and https://artists.proofprofile.net/proofs/artist/c6e2a615-678b-4300-9e84-6eb3d112c419.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
"068 Contemporary & Classical Discoveries": Return
"057 Classical Music Essentials": Angelico