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 0x1032e55b148c8288cb4a142e252234ae4143cfa61dbfc7edef27f027edea26f2. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d102c0a-68db-4220-bb81-1db0b15ce153.json and https://artists.proofprofile.net/proofs/artist/7d102c0a-68db-4220-bb81-1db0b15ce153.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
José de Nebra: Dos Lamentaciones y Oficio de Difuntos para Fernando VI y Bárbara de Braganza (El Patrimonio Musical Hispano 1)
Festival de Música Antigua de Úbeda y Baeza: Selección de Grabaciones en Vivo (2000-2020)
Recopilador: Cantiga Tanto Quér Santa María
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 0xa6158d2b98b5a19957a3c62838ae9e3148ebf34ab83fba0ceb3c9e646b787466. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES5682100684.
Sonatas para Dos Flautas Traveseras y Bajo
Todo ceda al amor. Música española del siglo XVIII
Franz Joseph Haydn: Trios y Divertimentos
Tonadas, Villancicos y Cantadas para Voz Solista Con Instrumentos (El Patrimonio Musical Hispano 20)
José de Torres: Días de Gloria y Muerte. Dos Misas de José de Torres (El Patrimonio Musical Hispano 6)
Misa a Luis I, para Dos Coros y Orquesta: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb475af8952159dc89e09c86518c0452baf1583ffdcc241c052d97a69f28fb0c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES98S1600112.
Villancicos al Nacimiento. Maestros de la Capilla Musical del s.XVIII en la Catedral de Valencia