Frédéric Devreese (2 June 1929 – 28 September 2020) was a Belgian composer of mostly orchestral, chamber and piano works that have been performed throughout the world; he was also active as a conducto
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63573b172fd616822d833881881821c868a5f5888743f2195ec9015d4eb99b55. 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/c6f97949-977f-476c-be15-85c714fd99e5.json and https://artists.proofprofile.net/proofs/artist/c6f97949-977f-476c-be15-85c714fd99e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Devreese: Benvenuta / L' Oeuvre Au Noir / Un Soir, Un Train
Devreese: Soundtrack - Dances, Divertimenti and Preludes
Devreese: Gemini - Orchestral & Piano Works
Frédéric Devreese, 22 waltzes, piano music
Devreese: 22 Waltzes (VRT Muziek Edition)
The Other Waltz from 22 Waltzes (Arr. by Four Aces Guitar Quartet)