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 0x370a6bbb2eb8225432cf82dfe510fa1fcb48de6f08e35d0aeb0c3250cf1c3444. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3eb0132-c239-4ebf-b88c-e3bcf8b6a75a.json and https://artists.proofprofile.net/proofs/artist/b3eb0132-c239-4ebf-b88c-e3bcf8b6a75a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mar Plana (Integral per a violoncel i piano de Juli Garreta)
Lluís Benejam. Sonatas for Violin and Piano
Manén, Gerhard & Montsalvatge: Works for Cello & Piano
Joan Manén: Diálogo, Belvedere, Trois Chansons
Brahms and Bartók: Sonatas for Piano and Violin
Manuel Blancafort: Concert Ibèric - Ricard Lamote de Grignon: Tríptico de la Piel de Toro
Carlos Suriñach: Concertos for Piano and Orchestra
Joaquín Nin-Culmell: Concierto para Piano - Xavier Montsalvatge: Concerto Breve, Alborada en Aurinx
Mozart: Fantasia K. 396, Fantasia K. 397, Fantasia K. 475 & Schubert: Fantasia D. 993, Fantasia Wanderer Op. 15
Fantasia Wanderer Op. 15, D. 760 en do mayor C Major
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 0xf13d99c672c8290ae2f606ca8d3b410f2978d56e8dafc951865a9731d81aab25. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5880400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd1863acf2f52eca81a798333ddbd651a6d865dfe5d4218c8c5a18f3ffb3ede. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES5880400346.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b271b280b6450783d9d11d53b6b440b7f96f2915010a38f32b0df650fd56ad. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES5880400341.
Schumann: Estudios Sinfonicos Op. 13, Romanza Op. 28, Carnaval de Viena Op. 26
Déodat de Séverac i Blanca Selva. Cançons en català, occità i obra sacra