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 0xd3930e8cdcb299600d6d8b7590bdd67294f9b18a734bd4fb6d19cd8da917a329. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9d21a48-4ea6-44fe-ac37-01a9b3e36d5b.json and https://artists.proofprofile.net/proofs/artist/e9d21a48-4ea6-44fe-ac37-01a9b3e36d5b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Revueltas, S.: 5 Canciones Para Ninos / Zyman, S.: Guitar Concerto / Coral, L.: Guitar Concerto / Ritter, J.: Fantasia Concertante
5 Canciones para ninos (arr. M. de Elias): No. 1. El caballito
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 0xcc9e7aa7b23316a63f3c3128dbdc5f0ed863a548f5f9aa5ec3e9e14f7311c0eb. 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/MXF580401525.
Musica de las Americas, Vol. 7: Agua y Vino
Por siempre Sabines (Arr. for Voice & Guitar): Por siempre Sabines (Arr. for Voice & Guitar): No. 1, Yo no lo sé de cierto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dfdcd83158ec5b7510826202787945d76d2109393156f119e41c586ee8079b. 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/MXF580501757.
Por siempre Sabines (Arr. for Voice & Guitar): Por siempre Sabines (Arr. for Voice & Guitar): No. 2, No es que muera de amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f8552ff946f211396a7e4a831da3f38f0b54aab18b2262fe799ea4d3a76708. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MXF580501758.
Lobo, Cris / Laguna, Juan Carlos: Jazz Arrangements of Concert Music for 2 Guitars
Guitar Duo Recital: Laguna, Juan Carlos / Sato, Norio - Takemitsu, T. / Vazquez, H. / Shimoyama, H. / Naito, A. / Enriquez, M. (Dialogos)
Guitar Recital: Laguna, Juan Carlos - Villa-Lobos, H. / Ponce, M.M. / Carlevaro, A. / Brouwer, L. / Cordero, E. (Music of the Americas, Vol. 6)
Musica De Las Americas Vol. VI: Preludios Americanos (Juan Carlos Laguna / Guitarra)
Tomás Marco - TAROTS (Juan Carlos Laguna / Guitarra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d59d13614fac2d7fb07f2d536000dd6cb92cf40054837922a1a530dcf082ac2. 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/USA560510071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7182a29ff388d34fffdfa1fea5df52d9147a7cbee5595ef2329ffeeca63b7e. 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/MXF589500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeee3248f9ed961fa0da67db9e38de9536211aafa67a7883722707bfea379efb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MXF589500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d105f3976b8e849644d83f1d334ac2b894c570221fff02527deebf9f3af896. 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/MXF589500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7a7de3489410ec85715d8fa37d21fafb5de959f4a12a7465dca3608f30a934. 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/MXF589500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf44f079ffeaa67967af9a27a8552800671212340885733a5577b12523870124. 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/MXF589500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a54203e7921401de0a2ddb09987325e6511549cf41f36a68458381b42289b9. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/MXF589500041.
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 0xd073a8fe4772f7dfac064716277ebb9c8c81a11e6a29b3299da29d96f0e233ff. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/MXF589500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66926922ce277223f7d6edc6020b2dd429cbc29877c4a7267e8332eb56d1d6d9. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/MXF589500046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b08f6e7856b80044a3bdcf903705b316c72af18dd24d3eefda93f63524edf7b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/MXF589500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f0c9a0bbb5d5bf91caf5a0e9fa62b4cd9dda3705109986801e6d518bc43464. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/MXF589500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fddea959392e9c4ea9c28dce2271de3a099368db79fccb426f1785a005b4119. 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/MXF589500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf5a562a0752d7630d3a491a935be8deaa88bf3ca979100c4dca4097fa725e5. 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/MXF589500059.
Festivales Guitarras del Mundo 2001/2002
Schifrin, L.: Concierto Caribeno / Guitar Concerto / Tropicos
Chamber Music (Mexican) - Oliva, J.C. / Gamboa, E. / Zyman, S. / Ruiz Armengol, M. / Martin, G. / Tamez, G. / Pascoe, S.
Manuel M. Ponce: The Legend By the Legends, Vol. 2