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 0x30414a80c380fcb1eeec6f4014452c44b0245f1904d233b06292361da70535c5. 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/a6240323-f4a2-46cb-8447-de4835908a3e.json and https://artists.proofprofile.net/proofs/artist/a6240323-f4a2-46cb-8447-de4835908a3e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Folclore - La Colección - Los Hermanos Cuestas
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 0xf0f55380bef9db8f3bbef678e72f6cf3a20045ed7f6ad90f1e0ead53c770ff84. 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/ARF109903320.
Los Hermanos Cuestas Cronología - Silbando Como los Pájaros (1986)
Canta el Zorzal, Baila la Calandria (with Los Chamarriteros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa8be01d450c6bc5618722a76590dfb5bb70b062cd09810e97d2a8272d8e94f. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:33:38Z), 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/ARF108600117.
Los Hermanos Cuestas Cronología - Idolos (1985)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3145dadd90b5e9af407479954bc58be78eba9f0ad7b2c692d5d850059644b50b. 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/ARF108500138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58aa00925669ebf5787da6c5c475333da042856da1d39a2343f22393a515a7. 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/ARF108500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae83783edcef56edee0cec86cd7707619c970d7502d76260e851326575d078. 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/ARF108500143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b473244b6a82c697ff0f0c033df482a7ecff25d75402452a3d13a12a51c4862. 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/ARF108500148.
Los Hermanos Cuestas Cronología - Concierto Virginal (1984)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5381d0578ac4d04f3d7433e3e0846762c212bb2362f8127d615b370a6389332c. 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/ARF100900631.
Los Hermanos Cuestas Cronología - Los 10 Años de los Hermanos Cuestas (1982)
Los Hermanos Cuestas Cronología - El Árbol de los Pájaros (1981)
El Árbol de los Pájaros (with Los Chamarriteros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea07b2086a81df4293e207b1f808c63b0416f3d2a90449f381f2c9e98240b635. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF108100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb804109b706c7e9961ca3262e331cc15bb07176964acad81d983febe24541151. 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/ARF108100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91622480c4b420643de43114d631f229ab508ed760e80ed83fefffaa1081847. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARF108100145.
Los Hermanos Cuestas Cronología - Entrerriano y de a Caballo (1980)
Puentecito de la Picada (with Los Chamarriteros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd044360de138fe250be074b791752f10e482f376efb9ff46e6381279dcc0ca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARFSB0700249.
Los Sonidos de Mi Tierra (with Los Chamarriteros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086ff8ede6959cc69d0c22259911ce774cda29722f0632b9123e1c98d0056af7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARFSB0700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211fdf398335510dfc5f977c8422f6343b264537969f7b8092c7b2f7924b81a4. 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/ARFSB0700256.
Los Hermanos Cuestas Cronología - Sonidos de la Tierra (1979)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd5965506005d069a0d2dd8e029250ca527247b43484fdefefe2636ab86c7c3. 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/ARF107900022.
Los Hermanos Cuestas Cronología - Invitación al Vuelo (1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c44412843ebadd743cdd5ff4e6dd5d76e1d6f8535425223bd0e6c55145b2d1. 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/ARF109900778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb155697d8df3c9c1e28d239728903539bc1b0d7984d7e659298466e93c9b4812. 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/ARF107700041.
Los Hermanos Cuestas Cronología - Nacidos en Entre Ríos (1976)
Los Hermanos Cuestas Cronología - De Entre Ríos al País (1973)
Apriete Que Va La Marca (with Orquesta Sinfónica De Entre Ríos & Coro Asociación Verdiana de Entre Ríos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e1a07e345047d3a0da6ca636b977f58a58fd80480489fed49c5a80a6d050a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARF100600033.
Los Hermanos Cuestas Cronología - El Canto de los Pájaros (1972)
ARGENTINISIMA VOL.6 - CONSAGRACION DEL LITORAL
Argentinisima Vol.10 - Exitos De Todos Los Tiempos