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 0xbfa40332e3637191051163dc315e34b15251a862d70b30a2b22373f56551dd4f. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cd95499-5a27-4012-b6c2-9a3a20243249.json and https://artists.proofprofile.net/proofs/artist/9cd95499-5a27-4012-b6c2-9a3a20243249.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sammartini: XII Sonatas for two German Flutes
Novae aliquot et ante hac non ita usitatae cantiones suavissimae, "Cantiones duum vocum": No. 1, Beatus vir qui in sapientia morabitur
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb4b8d0382641b41482bfd01d1c51a4ac897a6e1f77e644d9a11df21de7e5be. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU241107975.
Cavalli: Missa pro Defunctis, Mottetti e Sonate
Merci: Sei sonate per fagotto e basso continuo, Op. 3
Joseph Bodin de Boismortier: Sonate per fagotto e continuo, Op. 50 & Pièces de clavecin, Op. 59
Sonate virtuose per fagotto del XVII secolo
Luigi Merci: Sei sonate per fagotto e basso continuo-Opera III
Lully: Suite from Atys, La follie d'Espagne and Proserpine (Arr. for Wind Ensemble)
Cerimonial Court Music in XVII and XVIII Centuries
Nicolò Porpora: Sei Sinfonie Da Camera, Op. 2
Dario Castello: Sonate Concertate in Stil Moderno, Venice 1621 - 1629
Telemann: Double Concertos / (Overture) Suite in A Minor
O Crux Benedicta. Mottetti E Ricercari Di Claudio Merulo
Ayres & Fantasias: Elizabethan Consort Music for Dulcians
Petrarca: nelle musiche del primo Cinquecento