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 0x85fe379197d3abd8a8b79cd3ed78624015c2835e614380cd5229e1b816a3fb24. 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/a5f48de9-cb13-4d60-8f35-17841606222b.json and https://artists.proofprofile.net/proofs/artist/a5f48de9-cb13-4d60-8f35-17841606222b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x4866524a6a2abee0022cacb2167b17bd9202ae0aee101ef82c613f1b42ea3aec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNJZ2580065 — a six-check JSON result.
Mix Boleto (El Boleto / Amor Sublime / Amor Loco Amor) - Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde16d90288f7746cff2de12cb45e7014d06bb2e9f95dc1080571f936972cb589. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2580067 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2638f7c28f812fba90d08be785a32ccf910cb94851f81e572340bba3c8a4226d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJZ2579927 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5f8f65cc50f272df37a7181194f103a6fb5261ea1434eae2a89533d86e676. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNJZ2579928 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f2bfffd3f482aef7859caa7f571c2ef6d0850a0dc95479c345c3236c92a0c5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNJZ2579915 — a six-check JSON result.
Mix Nostalgias (Tu Ausencia /Nostalgias / Camino al Cielo) - Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5a4f3fad0efc5f311f48b1406a4e57ae76fba10edad1cffa380094e9e81ee. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJZ2579920 — a six-check JSON result.
Mix Pasacalle (Por Algo Me Han de Recordar / Por Tus Desprecios / Añorando Mi Tierra) - Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbc8ef599666713e46f8b453824782c12e6f9cdd5d4d1977c80b1d222d7109c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJZ2579921 — a six-check JSON result.
Mix Tinta Roja (Cuentame Como Te Va / Bolero Rockolero / Ficha Marcada / Tinta Roja) - Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e30f4baa08c98625baa0626b360513b2e2476d82d29fc270fa064c7efd6d8eb. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNJZ2576444 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87496c6e27ab2a499d9f9231123f5dce01903bbabd6b4f35a7c4bd6bcaaf6891. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNJZ2576446 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591c48e4ea1bb6f759d8b3090cc3945cbdc57974437c6fd7dcb22ad2b5f12525. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZGLM2432502 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d5c72eefb8b36a01b30a30854f8ff08cc0a52cefacc58e07420499adccb12. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZGLM2432504 — a six-check JSON result.
Mix Nostalgias: Tu Ausencia / Nostalgia / Camino al Cielo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbba403896040f2e3a3b4c26e4767b364748bfec0462d30a46ba0f2a19947624. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNJX2460319 — a six-check JSON result.
Mix 4: Ay No Se Puede / Esperanza / Mariposita de Color / Si las Penas Se Borraran
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2559bd35be8bc64174b9162d9f972c102a51f0f80389bd9fa4b1239209ca5df. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNJX2464990 — a six-check JSON result.
Mix Pasacalles: Por Algo Me Han de Recordar/Apasionadamente/Por Tu Desprecio/Cholo Querido/Añorando Mi Tierra/Palomita Errante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe585ce20a9334a892206ed6b1801e64b2eeb0f71c6f502b057237a532302a0b9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNJY2409811 — a six-check JSON result.
Mix Collar de Lágrimas: Collar de Lágrimas/La Duda/Las Tres Marías
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0267c425b13c9fdfc075e6b4a09d3d5cc72f075c2878d26659db8c31ee30e7. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZNJY2409812 — a six-check JSON result.
Mix Pasacalles 3: Chicha de Jora/Chamizas/Chiquichay/El Chinchinal/ Ay No Se Puede/Palomita Cuculí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f6f573d4a501ec251baa8d55e05713e018309c6596b80e9c1c870453d1b3e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZNJY2409813 — a six-check JSON result.
Mix Tumba Abandonada: Lejos de Mi Hogar/Tumba Abandonada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8b753d2ae3a605626056243cc3f0bca2ba04cd8d4c448dbc2560157961aa06. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJY2409814 — a six-check JSON result.
Mix Avecillas: Avecilla/Amarguras/Desdichas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4868052712ca8fc0c23dec2542c8ebd997c441c10774f534ca6a042872b31dad. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2409815 — a six-check JSON result.
Mix Carcelera: Mi Carcelera/Salcedo Lindo/Guayaquileña
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ba9e4ee59642694fae37052d9497df5eddfb77abbdd9e6894fcac2369cff37. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNJY2409818 — a six-check JSON result.
Mix Santa Rosa: Chamizas/Ñapanguita/Santa Rosa
Mix Mientes / La Guayabita / Orgullo de Mujer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd7eba6847ad8cd6b45ef10d0bb2d30db172332f57b346af09387dca198a197. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTPX2454374 — a six-check JSON result.
Mix Criticones: Me Critican / No Es Mi Problema
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29318a80a9377c077906b0dd55038c27a1bcff3d192d30bc98ee8ee5f68b6077. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9K2498174 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03988e3819c5e959cd61534bb6b92e7c75c25abb78e9de1258b009863b9ede6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZGLS2517908 — a six-check JSON result.
Mix Maridito de Oro / Comisario Municipal / Cóndor Mensajero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a70c34bfaba597e9f460055c2b929ba6ebf3f018e055b25bcc694cf2b0015a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLS2517909 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7126f04a21bf36ba76425d2b28774ce6fdfb62acb3b4ae66f2f95ab0785013dd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLS2517910 — a six-check JSON result.
Mix un Resabalón No Es Caída / A Través del Vaso / Cruel Condena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d66467dbeb6b711f677962425f0e8458f23ccf6bce7a071958af7ad5f5c3e0. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZGLS2517911 — a six-check JSON result.
Mix Tormentos / No Hago Falta a Nadie / Avecilla / Amargura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39972cea286fc7c1df8940bf62b6eb176c3a506dfb3f684d0b62f58e49dc357c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZGLS2517913 — a six-check JSON result.
Mix Conejito / Corazón de Chancho / Cuando Yo Cantaba
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c11e039fc0c87f51e293d9a06020c11d2c41fb86ea8a6fb8a979d6717beab27. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGLS2517915 — a six-check JSON result.
Mix Buscando un Cariño / Una Lágrima / Pasito Tun Tun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00999ee7924674a6fd5dc43b392c27751580adb5afbe616e03ef34ff75b6f84e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGLS2517916 — a six-check JSON result.
Mix Rockola para el Corazón #2 (Deberia Odiarte/Tus Pilas Gastadas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45ee4d1f47f827ff7e46fc3a70364dac4c35da155b3f31e656c799bb51d0de3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJZ2590554 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5bbdfbe746ab46515873ff4c00f66a208fee977736063e6378ec20501a10d77. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTPX2521604 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199d393af9bb6350f457e097b27f204184de13067110207502633bc7ed63bd61. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTPX2521606 — a six-check JSON result.