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 0x84cd648f65ad018ff7051035ad948b8583b0e3e8d20986048f3d22449d77a9c1. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebb405b7-3fa5-4d02-8cb7-3e5f3e52ad9c.json and https://artists.proofprofile.net/proofs/artist/ebb405b7-3fa5-4d02-8cb7-3e5f3e52ad9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chamber Music - Milan, L. / Aranes, J. / Mudarra, A. / Guerrero, F. / Martin Y Coll, A. / Ribera, A. / Ortiz, D.
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 0x98c163d41cb2bc25f222713bea47bf8ffd38cbc262e6666244485c9a39152f0e. 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/ES7890500503.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 33, La Esfachata de Napoles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c51e381e307578a3217d6c6d4ad07d8edd43e9a67d0deaeae513c9b91b54dcd. 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/ES7890000506.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 35, La Minina de Portugal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5763566f4e406fe3e9f42c1c316ee9639d02c193649907ba8cf9e435699a6a. 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/ES7890000508.
Instrucción de Música, Book 1 (Excerpts Arr. for Chamber Ensemble): No. 32, Batalla
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12589563864391c01257baf8819d6d04ee32797298d03ccd7c5fda733a67b2ba. 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/ES7890000512.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 7, Matachín
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e990c93b8b8946c8806b24299b2b2ad41d1541f2bb1e36a48607efac2724c1. 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/ES7890000518.
Instrucción de Música, Book 1 (Excerpts Arr. for Chamber Ensemble): No. 33, Passacalles Sobre la D con Muchas Diferencias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaec0e7837aa82940d5a29a56a5f4efd244de3dfb8eb7b537f6a0f01c863c2db. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES7890000519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee419a59346afe5a64210cae5b31b286327ccff2eaef62f8938f3aa74b6fd515. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ES7890000501.
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
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 17, Marionas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4806dab030881c43bca1ef047425b0c0dd8408cfdf1b20c130b0e4aa6749cc1. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ES7890000502.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 8, Zarabanda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23228f6319a994ba9a8d124c9b17891e540e554c2692634be1bb3a69e5f5df4f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES7890000503.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 37, Clarín de los Mosqueteros del Rey de Francia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a74bef1788fde4c216585127af9b444cecd0da54d09e43f940b99d0a1ade6d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES7890000504.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 28, La Cavallería de Nápoles con Dos Clarines
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600af37ff4a86b1225346b6144b1d88f6544386da61d35843bc269e8ba8ed894. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES7890000505.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 27, Clarines y Trompetas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859df6a848ac87102eeced6b309f54830b53ba78276c7ba0bd967f9ebbf24e23. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES7890000507.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 29, Canciones
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4a0b3346776d6ac185d39d63e40683633fe7a7c8db01c010da923d6887a67d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES7890000509.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 31, La Coquina Francesa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e446661bc7d699fa28c01d2ee0894e5657461c2ea08905ee425e2b20588df8. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES7890000510.
Instrucción de Música, Book 2 (Excerpts Arr. for Chamber Ensemble): No. 12, Son Españoletas por Otro Punto las Que Se Siguen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b6c8ba968b21848abd8982e081db2c49e8dfc96ac51457c63a9a891cfd512. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ES7890000513.