José Tejada Marín (November 7, 1903 – December 4, 1976), known as Pepe Marchena and also as Niño de Marchena in the first years of his career, was a Spanish flamenco singer who achieved great success
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 0x394b38d08f8f93aa96fb8fd097fdfef8c25bbe4b080fa0d3fd45bf60e6edb487. 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/6c9da55f-ea67-4cce-a2f8-4f9f2a5e3543.json and https://artists.proofprofile.net/proofs/artist/6c9da55f-ea67-4cce-a2f8-4f9f2a5e3543.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb42a3668a12bfba4404f3a00d3250d93b88ac4b14f294edea40bddd73ce80c7c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEXN92267091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9496d5d8c2c390ad3ca075439deba77d3beb7629a6b914d519eb378afc7a76. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEXN92267093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1651bb5c0efc52b1235efc9485a26b7c5c36f3e5a48f024a7ac0c84ad6340. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEXN92267094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2879e30b9de7c5de054ddcba72a865a9187de7a0490687e1909fdd83c795ef2b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92267095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894b6571b6fb870b8f01aa87cac768333f63c6a6b07a6b5219a1d68b50cdd097. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXN92267098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccad2ac1217ef1254f1fc6d65a660f444512a0c5d82842a428d5fa363cbe8b8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEXN92267116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ce9a5150eaf928f2a1409c444ddcd01812f880a10c3b31bd6ff1dd22ec10ff. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DEXN92267120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc4c7bba22472d31b9717c7795f69e4ec9508c742cc3494837d42baa49d04fe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5086900066.
Carmenes Granainas - Los Cuatro Mulenos - Un Alto Camino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612c99d240993e2daba272b4deea1c9e3fdb84fd532fbeadde571b6b35ce46bc. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:51:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5086900069.
Grandes Clásicos del Cante Flamenco, Vol. 8: Maestro de Maestros
50 Años de Flamenco, Vol. 1: 1940-1990 (1ª Epoca)
Memorias Antológicas del Cante Flamenco, Vol. 3
Memorias Antológicas del Cante Flamenco, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a563ec2bb555d6dc43d716261e1157e60b117480a7a84bd95c622e2a061b32. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ee5f2da6ddfd192dd662d89881840cd9b5988b3eaccdbe544b142e4f1ecfbd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581300740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c820fc7e8d5097738b6922516010754d7d43efe87fe90f633a56dd1c2c07f7d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES7581300750.
Memorias Antológicas del Cante Flamenco, Vol. 2
Romance a Córdoba (feat. Guitarra: Paquito Simón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aab8401be747d6336addf3a32d1364fc4a79efb8965c309548ba99de61fc156. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ES7581300319.
Antología de las Mejores Voces Flamencas Vol. 1 (Remasterizado)
Todos Sus Éxitos, Vol. 2: Spanish Flamenco
Las Acacias Cordobesas (with Ramón Montoya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e9b22b36ee799abb2b929157265f28f9d44198418118723d9d86a150e6d7bd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5270601001.
Vidalita de Juan Simón (with Niño Ricardo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30ecd92b77826f4e08a9824edc0c488e4e7788fc754abaf95cfae2f5712d985. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5270302101.
Los Templarios de Málaga (with Paquito Simón)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a50089cbed28f5b9360c0427adac7f71afcd204f6312da1987d54397f72d89. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ES5270003205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5821ad1e5bcff2c27d0452eb71b0f762a35a6b92ddb2db55fea63841d4f390. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:55:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5270102507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4b53a2a18c31d6875ffac053141335a217a49becdb8fdf435fa83f64c1d340. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/ES5270003201.
Cantes de los Picos de Guanabacoa (Guajiras) [with Alfonso Alfaro]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3e4c117f9bdf6227bb9cf7a911c6f4da7a5def006ceae6c51660b0a248118. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:47:03Z), 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/ES5270102801.
De Calatrava He Venío (Tarantas de Marchena) [with Ramón Montoya]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5420899203cbec976853d1ad14236f0b5fb2ea342f9a83e9c2fef3fd7bbe5a. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:53:01Z), 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/ES5270302127.
Me Saquen a Divertir (Fandanguillos) [with Niño Ricardo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa69549d9fdadb5d1678f2983bb1d86c5c1fab65d0b5c835f08606fe5a4de233. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5270302106.
Grandes del Cante Flamenco: Pepe Marchena
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139227b81dc23f09c1d743fee42b836f0d0c10faa86b05582fe3898f1687d954. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USESK0604949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecb39dc6b4922444ddfd3fdf10342cdc9beb94e8ba7a45d9282353876120dc2. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:39:59Z), 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/USESK0604951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc002a736c425674b827be5b6f328f57525e447f0bcedfa7a3244351abb980b5f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81418900.
50 Años de Flamenco, vol. 1: 1940-1990 (1a Epoca)
Antología del Cante Flamenco Vol. 3 (Remastered)
Antología del Cante Flamenco Vol. 2 (Remastered)
Antología del Cante Flamenco Vol. 1 (Remastered)
The Very Best of Flamenco Music: Pepe Marchena
Verano Flamenco - Pepe Marchena y Su Legado Flamenco (Remastered)