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 0xc4d3e8ab58834352bb252e74324e85b0dac854c3e128f6a25b5406bed8121aeb. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/258a994c-7aa1-4658-8fd0-b81bf3785880.json and https://artists.proofprofile.net/proofs/artist/258a994c-7aa1-4658-8fd0-b81bf3785880.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Il mito dell'opera: Jaime Aragall (Live Recordings 1966-1977)
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 0xd4eae3f620bf26a1100d560a0aa18c1e5428b008c15c0514d3dbb6058cea2cc3. 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/ITDQ71101223 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fe31238b158ab4dc6b934584ccf751ca7cecf473aa1b5c1c6aa28bab5231cf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5300205276 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb472ae02b286b78a5f95809514a828b6a0c1cb22c45a2831a38bf422ab10ca84. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5300205277 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a89ea29bdebec614161b7f45a618dc0adca14e357ec0eaeee4c16ddf3d9f6e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES5300409536 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb21eebfb1aaab89f537c17aabca28a4fafeb5e2716287851b3cbdd381384094. 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/ES5300408610 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799310462c74ea7516dc9043d0f8c85aec922eb0ad0ac221c4e9c743f64e493d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES5300408613 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aba00baf6c0ac37a4eea48de9d4894e630c554cb510125c8fae8977181ab6af. 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/ES5300408614 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1077198a1ff0c4e8c67ca77ba50104a5d8569755b6d1b0cb0934b8a0891dad64. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5300307431 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c90321a12910b668caeb586cdfb4b28a9114f43ee268810c46d11d62e070ef8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5300307432 — a six-check JSON result.
La Parranda: "Canto a Murcia" - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9b4763e51ee4be6077b68ad206b4ce0d9a2e7a77d36984c324a33eaec12dd4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021800759 — a six-check JSON result.
De Este Apacible Rincón de Madrid (Luisa Fernanda) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceac00af0623871351076bd01d22de99856673194a911a8a82ea19f7da777e2. 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/ES5021800790 — a six-check JSON result.
"Hace Tiempo Que Vengo Al Taller"(Manojo De Rosas) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17187065fe231864b7287545eafa7fbebef7994bd8e76237cd37fca1ec29243. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ES5021800760 — a six-check JSON result.
Preludio. Orquesta (El Caserio) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc709bda29961be45ce9bffe8c17586a079b4483506377b792a7f1224a05a047. 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/ES5021800775 — a six-check JSON result.
"Duo De Los Paraguas" (El Año Pasado Por Agua) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf6f8ac8e010d60c617fa9eb8e19b6a7d6488aae37b3ba6eacd39a242414b0c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021800761 — a six-check JSON result.
Intermedio (La Leyenda del Beso) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293ae27a08a88a5e0a290b1077ea770c06b9f7a71f47d9c73b229830eb7975c2. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ES5021800776 — a six-check JSON result.
"Soldado De Napoles"(La Cancion Del Olvido) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c811f7dcfc6d3d69cbdf41bad56a0c9e1d81797c0065c7f989f4c6a7d0ed3c3. 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/ES5021800762 — a six-check JSON result.
Intermedio (La Boda de Luis Alonso) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656909633c4fb374f1db1d10cf33a2364a7b726134e8033efcc02e767daf6056. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES5021800777 — a six-check JSON result.
La Dolorosa (La Roca Fría del Calvario) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a2740273abbf48a291a2d9d436b22bab6c921f6da9ba5050883c0146e8b6b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021800793 — a six-check JSON result.
Yo No Se Que Veo En Ana Mari (El Caserio) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb6baec70045d59a8238fb2238b7724853c33ea9ea3a2741dfaaed82cf41aa0. 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/ES5021800794 — a six-check JSON result.
"Pasacalle De Los Chisperos" (La Calesera) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7379a42d0a17530d8eb4a02a08727480c67247f71e841722aa4ba789f105d5d8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES5021800765 — a six-check JSON result.
Preludio (La Verbena de la Paloma) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86576578595b74db51853c2ff99102aa17cba4baee40df48abe089144114eb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021800779 — a six-check JSON result.
Paxarin Tu Que Vuelas (La Picara Molinera) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e5794ec38c48fd88b319b4b173b5c4112e53095757c04d608b207e0712b47d. 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/ES5021800795 — a six-check JSON result.
"Cuples Babilonicos" (La Corte De Faraon) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956556b11c9fab28226da9a6943bbec5169400db5f2dc83a8781e5ad6ce9a4f6. 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/ES5021800767 — a six-check JSON result.
"El Piropo Madrileño" (Maria Manuela) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae14d86c7bc30178644c100bd2c2936187f6f1c7bf27b45bcfb47ca11b839f2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES5021800768 — a six-check JSON result.
"Habanera: Canta Y No Llores" (Don Gil De Alcala) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3955ec51121a23dfdb2687dacd2d6e04df2e6a4b39aa0cd006428f30e616cd48. 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/ES5021800769 — a six-check JSON result.
Intermedio (El Baile de Luis Alonso) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09c640c732deddd7b67c5a326012d72c4b28bdb125caf9ef815bd0f12943d5d. 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/ES5021800783 — a six-check JSON result.
"Soy Arriero" (El cantar Del Arriero) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf18985afe06679167a5b639ed4df6351a64c7af3474146c7be8d66515d884b. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021800770 — a six-check JSON result.
Preludio (El Niño Judío) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe219f8f8be299f30de7f37e1f351e8fcaeef1243306f282bc26fd5d7616bbd02. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ES5021800784 — a six-check JSON result.
"Duo" (El Duo De La Africana) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8655dc4d9fc06ac9c419f49a020c972a7b88566b9a670bb2855b007518020a23. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ES5021800771 — a six-check JSON result.
"Soy La Chula Madrileña" (La Chula De Pontevedra) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69d35afba6bd6e5366b4574bd5d0a321ddd80892a552a700f3970d0a6682285. 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/ES5021800772 — a six-check JSON result.
"Donde Estaran Nuestros Mozos" (La D. Soto Del P.) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9013c111299cfc43eb32b2c79ae1d0d37c0c7cb72432e24dcb151e3210a3dde2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021800773 — a six-check JSON result.
Romanza de Angelita (Chateau Margaux) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695f8469c15b46958cb7262d4757b8348276eb2037b97d7bc677829f000e875c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ES5021800803 — a six-check JSON result.
Que Te Importa Que No Venga (Los Claveles) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8461782e497cd10ccb7bb287893fd0af0acaaf35f2148be15cbfe8a1487c53a5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021800805 — a six-check JSON result.
La Chulapona: Como Soy Chulapona - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fca2519712d105e7874b60a46869003ecb7a4608bb30c19cc7ac40ea79636c. 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/ES5021800807 — a six-check JSON result.
Mujer de los Negros Ojos - El Huésped del Sevillano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe8a32027f1dca6faa9f5af9df3285073421464be285e9d5894f1f52b2f3e78. 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/ES5109100170 — a six-check JSON result.
La Roca Fria Del Calvario - De "La Dolorosa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb840d9df5cdcc2afda66a5f9ab47c278439712d0250f236af6e60695de84be. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5021300258 — a six-check JSON result.