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 0xb345f4f136c16ae9d190dbcf6c580335ac4bae64c8ddd69eb3ce283501625647. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dcfa416-6c3d-4a6f-9675-711bbb638f51.json and https://artists.proofprofile.net/proofs/artist/8dcfa416-6c3d-4a6f-9675-711bbb638f51.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chamber Music (Baroque) - Ragazzi, A. / Avitrano, G.A. / Barbella, F. / Marchitelli, P. / Fiorenza, N. (Accademia Per Musica)
Stradella, A.: Sinfonias - Mcc 2, 17, 20, 22 / Colista, L.: Sinfonias - W-K 21, 30, 32 / Lonati, C.A.: Sinfonias (Accademia Per Musica)
LEGRENZI, G.B.: Cetra (La) (Accademia per Musica, Timpe)
Musica Napoletana: I Virtuosi del violino, Vol. 3