Roger Argente (born 1962 Neath, Wales) was Principal Bass Trombone for the Royal Philharmonic Orchestra and teaches at Royal Welsh College of Music and Drama, Cardiff, Wales. Career A graduate of the
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 0xd5666f75a7be0366bf8267eab73e887fddcbdf545c29fd1054fdde88842ff11c. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0905c2f-c7a2-49c8-b808-7cbc422ade55.json and https://artists.proofprofile.net/proofs/artist/d0905c2f-c7a2-49c8-b808-7cbc422ade55.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).