thumb|Carlos Miguel Prieto in 2014. Carlos Miguel Prieto (born 14 November 1965) is a Mexican conductor. He is music director of the North Carolina Symphony, the Orquesta Sinfonica de Mineria, and T
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 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 0xdac44e30c19f1899b01b0ab46e88e69eb379107b87e340e458bdb46652c50877. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e57df12-2787-4a89-aab4-4d950ca22199.json and https://artists.proofprofile.net/proofs/artist/2e57df12-2787-4a89-aab4-4d950ca22199.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Revueltas, S.: Homenaje A Federico Garcia Lorca / Redes / Musica Para Charlar / Sensemaya
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 0x3f972d7e8bed50a861a5f6d52e352fb760d5e45db00757cd55abad9676d48674. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF580401450 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00565d2e49b68713e347777741c3ac110a82bc4189c5fc25e00379e429c67fd1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF580401451 — a six-check JSON result.
Homenaje a Federico Garcia Lorca: I. Baile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068a67c42fd6ecccd4f49c9011f2406c1a1c0f2c956e405ccbbac58e080e02aa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF580401452 — a six-check JSON result.
Boléro: I. Tempo di Bolero. Moderato assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf524923c69005c10ae09cc84babd68e43ab838689cd748161b8c62b1af2b53. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6P41416636 — a six-check JSON result.
Violin Concerto in E Major, RV 269: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c30899b503b670b3c90dd67a3477aaa5ccf3530891b622c1ddf3b23ba40a0cc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6P41416641 — a six-check JSON result.
Violin Concerto in E Major, RV 269: III. Danza pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d7516fc17cb198a86a1cb6d94dfe45712a67aca4b8afe31f3c2947dab7c33. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM6P41416643 — a six-check JSON result.
Gabriela Montero: Piano Concerto No. 1 "Latin" - Ravel: Piano Concerto in G Major, M. 83 (Live)
Piano Concerto No. 1 "Latin": I. Mambo (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9cd3490b7fe7fba3162c36aa3b30076005b35436ed5d203bf84b286ed32752. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS1900124 — a six-check JSON result.
Piano Concerto No. 1 "Latin": II. Andante moderato (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdcac8aea4a1f278a322d88d20b452050ca6fc193c6887aaf1d329c2487d02f. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS1900125 — a six-check JSON result.
Piano Concerto No. 1 "Latin": III. Allegro Venezolano (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc755cce106a381122ebae33f1f5c8ed942cd5f2debe0554d98c8401b6bc0859d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS1900126 — a six-check JSON result.
Piano Concerto in G Major, M. 83: I. Allegramente (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e1e9bd2e83a760b70a08b63b3785bf319396b36e11aad6653dafa717babb37. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS1900127 — a six-check JSON result.
Piano Concerto in G Major, M. 83: II. Adagio Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b106a47ae04ac6f65b0c83a17e2a719baeb5b19b88b4e7019a23f89b13e859. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS1900128 — a six-check JSON result.
La noche de los mayas: I. Noche de los Mayas
Revueltas, S.: Noche De Los Mayas (La) / Itinerarios / Ventanas / Caminos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfec7385c3abec57204c59b33f6eb33a5d0f7572555f5d0dff4b192c0d04333c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF580702186 — a six-check JSON result.
La noche de los mayas: II. Noche de Jaranas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474a1b839c4eb6f232efa44100979f19d8156182f26593aff3d4c74cec70d36c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MXF580702187 — a six-check JSON result.