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 0xeb53ca49a973610f5c61af8501eefde8a97518beee6dbb493c88c8449eccf205. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0808935b-08e1-4618-8e2e-f171095f5e98.json and https://artists.proofprofile.net/proofs/artist/0808935b-08e1-4618-8e2e-f171095f5e98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Doña Francisquita, Act II: Romance por el Humo se Sabe (Fernando)
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 0xed3ed0d68cf999dc9c85263fd514c77152d4b6485e1bc40f02af73986e00c56d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FR10S1732196.
Doña Francisquita, Act I: El Lañador (Lañador, Buhonera, Cardona, Fernando, Aurora, Irene, francisquita, Doña francisca, Doña Liberata, Doña Basilisa, Lorenzo, Juan Andrés)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4144a148f9691d61ae101ac5026c27a50b5e69fcdcad4f66798e148d8f83858c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR10S1732186.
Doña Francisquita, Act I: Siempre Es el Amor (Francisquita, Fernando, Cardona)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b786762348a6c8e62fb1693f5c8025b08eba840184517b783a29ede6c9f66. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR10S1732187.
Doña Francisquita, Act II: Escúchame (Aurora, Fernando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42c1fabee1edf8915c3f46a457dc02d9a1e51a789f195cba1ea734e706f1555. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FR10S1732197.
Doña Francisquita, Act I: Allí la Tienes (Cardona, Fernando, Aurora, Irene)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f98e3209af1297d3b2d8153117500f533f2a169ac4c8b672a3be99e79a354. 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/FR10S1732188.
Doña Francisquita, Act II: Bella Estrella (Francisquita, Doña Francisca, Fernando, Cardona, Don Matías)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0db49cbb295275fb63f5d8c2dad875335cae33dbcd96a481ad12b1e673c615. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FR10S1732198.
Doña Francisquita, Act II: El Que Mis Bailes Quiera (Lorenzo, Aurora, Francisquita, Fernando, Cardona, Don Matías, Doña Francisca, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8fe216b48e55d40628019cbdaabcea2ed03ad753be18e912a58cb383a2cf6a. 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/FR10S1732199.
Doña Francisquita, Act I: Cuando un Hombre se Quiere Casar, Pt. 1 (Cardona, Fernando, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f492d853fcbda15d5bf9ca783ef63f7a3af81785ea778e39ce67cd6f8adf0ef. 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/FR10S1732189.
Doña Francisquita, Act I: Canción de la Juventud (Cardona, Fernando, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb54d4b15d8e0bc7508b7d22619ea13d07e26130caf94c53f76f76853432f26e. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/FR10S1732190.
Doña Francisquita, Act III: Prélude y Coro de Románticos (Sereno, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea48d3f0fa79e67572e27da506906b8e951d245d8c1459952dd0fbec1a1058e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR10S1732200.
Doña Francisquita, Act III: Aurorilla la Beltrana (Sereno, Coro, Aurora, Fernando, Cardona)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b28c671fe85fb61cb9c932497855a1d007c90cbf28587552b9541e5eed6360. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1732201.
Doña Francisquita, Act I: Cuando un Hombre se Quiere Casar, Pt. 2 (Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa68ac15d468fc389aafd3474e6a3ca69b2f6d42608aa01c4970579ddc302ab. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR10S1732191.
Doña Francisquita, Act I: Canción del Ruiseñor, Pt. 1 (Francisquita, Fernando, Cardona)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cbdea99ab889d5881fcf48d5fd0fb1ccf10d356b1bd0ae0df6a1a6c189b53e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1732192.
Doña Francisquita, Act III: Canción del Marabú (Aurora, Cardona)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cb0df599a42b3519420ef41466c0058acdc384c6e289a267357abef9798022. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR10S1732202.
Doña Francisquita, Act I: Canción del Ruiseñor, Pt. 2 (Doña Francisca, francisquita, Fernando, Cardona, Aurora, Lorenzo, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0817a8e4c342803bcf466569cb2b30c946fb8013bc9f624e152b405f89acdfd. 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/FR10S1732193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675113f450664d4824114de49e95c4d2cf5e78fff68a38b54139a1e77080a4a8. 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/FR10S1732203.
Doña Francisquita, Act III: Yo No Fui Sincera (Francisquita, Fernando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68118a831c579be4f47f0efb59d08bae7bdaf2274e013ad2aafeee24391ae33. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR10S1732204.
Doña Francisquita, Act II: Scène y Cofradía de la Bulla (Aurora, Torero, Maja, Miliciano, Mamá, Niñas 1 y 2, Jornalero, su Mujer, Chico, Aguadora, Dependientes 1, 2 y 3, Naranjera, Cofrades 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1e21dc46d15691677d0b361f0ac768b09581bebc1b3e4445ec2f47d1e11da2. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR10S1732194.
Doña Francisquita, Act II: Le Van a Oír (Francisquita, Fernando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4dff3dab2743862b054a0a25098ba1271f8d878c614cdd33fd8a29e1db6b85. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FR10S1732195.
Doña Francisquita, Act III: Canto Alegre de la Juventud (Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339981cc360ef5fcfb24970444a9561602789bc721ced34028432c4d5820c331. 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/FR10S1732205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee2e71a287e5d7b4f60a3088b181debdc864519fa2fab0de6d42619a0f83b67. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201667783.
Bohemios, Act I: Chanson de Cosette (Roberto, Victor, Cosette)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e227ad2844f72936733e01b8e29d92a9edd2b348ff378f53be4cdb6d765e00c. 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/FRX201667784.
Bohemios, Act I: La Niña de Ojos Azules (Cosette, Pelagia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77713d72341be953135767ba75946f951f068673a0b64a5892531d951a0d66d. 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/FRX201667785.
Bohemios, Act I: Chœur des bohèmes (Victor, Chœur, Cosette, Bohemio,Juana, Cecilia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c90bbda4b1393a3d5a409ca62eacc280ffd44b8b749dea5c1baf46e97b153db. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRX201667786.
Bohemios, Act I: Que Alegre es el cielo (Roberto, Cosette, Juana, Cecilia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591c86f58ada65eba64f9a1ee33dfcf360dd254af88cf813d7d391d08c103c9e. 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/FRX201667787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdf10c991bba2f21d9004eaa378a7c888fb28dde02042c218331708126f9160. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX201667788.
Bohemios, Act I: Linda Cosette (Girard, Chœur, Victor, Roberto, Marcelo, Cosette)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfabf56a31ae825513582ad61714658e6a6a6d22b49f8201a2032ca9c1f1784. 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/FRX201667789.
Amadeo Vives : La Generala (Zarzuela en dos actos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0da69db5826a95c231ff3e022d94fa0dcfaa019837e933d895e5094b70db61. 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/ES5271003824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d035c682548f4a28774bc2fb89d0e16a55ab62d59ab4402975509c80b3bf14. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW1574987.