1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2a2d4275635769ea22e2b3d2f97d4224539d67569c2f884358780f605a18ef. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a0ac926-b3af-4249-b5ff-e40b4ce36368.json and https://artists.proofprofile.net/proofs/artist/3a0ac926-b3af-4249-b5ff-e40b4ce36368.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Flute Music of the 16th & 17th Centuries
Bransle de Champaigne / Bransle de Poictou
Cavalieri Imperiali: Zenobi & Sansoni, the Great Cornetto Masters
Anchor che col partire (Italian Madrigal): Anchor che col partire (Italian Madrigal)
Cornet Music - Merula, T. / Rore, C. / Gabrieli, A. / Frescobaldi, G.A. / Palestrina, G.P. / Crecquillon, T.
Madrigali a 5 voci, Libro 3: No. 3 (1c), Vergine pura, d'ogni parte intera
Philippus de Monte: Madrigali spirituali
Ancor che col partire - Embellished Version
Ancor che col partire - Viol Consort Version of the Original Madrigal