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 0xa7bd057b917b2cc8e298c28c747aad2b978bd38765932f95d0231b634dd2f35c. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12011ffe-43fc-4ef5-b461-dec2a15250cf.json and https://artists.proofprofile.net/proofs/artist/12011ffe-43fc-4ef5-b461-dec2a15250cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7d13837a6de6f7cd9d8aa8b5bcdbef0b8de2fc2528db5e6bd2e66555aeb5295f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM11000992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cd4f47da385f77298b0ccb5c189492e5b7781d3ded7f508c91385d5c698b5d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM11001001.
Melodía for Violin and Orchestra, Op. 1, "1890"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143038180e284d101445e2a7e514bfc5fb27a2b9c53c3aeec988ffcca9051803. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USSM11000993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd766ec507da57671f4e00be764338fb59303f29b261b3a30eba55a69e450eef2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSM11001002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c742c75a5748ff481675c937f8d2c051e59128cddc5bdf6a298b99d5c53bbd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSM11000994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813c7fa3ee4d830fe68ade4fe680993eca20b5bde71dff9c4a8bdb1719b9a176. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USSM11001003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ae41e6c473bf39b18dbea22b71b76d729e83338ab38ec3a22da165a0d62a50. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM11001006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86da906b7fa88690dba7de7386fc1ab784bf6c2a94296eda3a9968371094e63f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USSM11001000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f17eb06a5ad70655612eeeb07a6981b049dd089dbc50d2262a6be486164f8a. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USSM11001004.
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
La Aniquilación de un Sueño y 8 Sonatas para Piano
El Pequeño Príncipe: Ópera en un Acto (Basada en el Libro de Saint-Exupéry)
Genio y Figura: Música Mexicana para Piano
En Clave: Piano Music of Marquez, Ibarra and Others
Un Viaje: Ponce, Mozart, Schubert, Armengol & Ibarra
Angulo, E.: Noche De Alebrijes / Ibarra, F.: 5 Miniaturas / Ponce, M.M.: Petite Suite Dans Le Style Ancien / Lavista, M.: 3 Bagatelas
Mexican Music for Harpsichord from the End of the 20th and Beginning of the 21st Centuries