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 0xca8065f3de563fb5a12bbb07fcdaa2526e0d447d4e13dfa4bb1b3f5b338ce813. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61587d9c-0fae-4ef6-9b1e-c0cff9d6f0f8.json and https://artists.proofprofile.net/proofs/artist/61587d9c-0fae-4ef6-9b1e-c0cff9d6f0f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
W.A. Mozart: Music for Wind Musics - Vol. 2
Beethoven: Fidelio, Op. 72 - Schubert: Wind Octet, D. 72 - Donizetti: Sinfonia in G Minor
Beethoven: Complete works for Winds and Brass Vol. 1
Rossini / Gambaro: Il Barbiere di Siviglia (transcribed for winds)
W.A. Mozart: Music for Wind Musics - Vol. 3
W.A. Mozart: Music for Wind Musics - Vol. 1