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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ef832ecfab77ef0bf48ec89cd3682d4372231463941a512944f873ed5e357e. 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/055389e2-7bab-4ac1-bd5a-19aa610702f9.json and https://artists.proofprofile.net/proofs/artist/055389e2-7bab-4ac1-bd5a-19aa610702f9.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9593a35822fff4434127be94a05f553f88efdf3cb8c9152ae3fae2e188621522. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5078800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfab3ba469a9487acdb31c56ee8745089310899aa64cc304226dd1ad8feec60. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ES5078800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5570d50be3e72f1553579e812a8a0380115e8bc7c6300e2682744bb3f0316eaa. 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/ES5070300126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc155d57cbbb90dad4903a1b5cc02ebdffe5a20918b6a4b4b1df195cfbe9a8310. 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/ES5070300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad3cc60a89f51cf11938d08473a6a13543ec59469c2dc9f2a08bde88194cd9. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ES5078800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fdf4f067b309dfbfca606f2b1922ba9f0b12e25502b0aa01ee097e051588f1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:19Z), 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/ES5078800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5c92278849cac06ddd444f0cd6429d1ce89146d5e45d36ef44f6e1c408fdfd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5078800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb620e158ffb5912064726887b812fa45ed4fee8500941337400a0d44b78968e5. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/ES5078800086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e227970d46148cba33de792e3bd85d70c332ea2bd7cbce05922ada6eb9f48b2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5078800094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ad3cc60a89f51cf11938d08473a6a13543ec59469c2dc9f2a08bde88194cd9. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ES5078800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bfd206946770b302b420f09051b7a854fb5ec4a4a59950f144ded233d8368b. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/ES5078800095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fdf4f067b309dfbfca606f2b1922ba9f0b12e25502b0aa01ee097e051588f1. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ES5078800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06367dd9966e538a58374b24d0829af1b6c26f460d7ae44d5dc65ab7370638cf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5078800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d223e679331013aca5f9716e01183b027b277af29b4c5fb2db0081d16f2a0c. Chain 2 (Bitcoin): anchored in block 957632 (2026-07-12T00:10:15Z), 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/ES5078800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae04f6677f9bf1a5fedd1d71c25df7969377d23605542e092be825523a4afc6e. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ES5078800092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb851086d78f47e2ca65b23b74f5f0c4344a0f621197d0205c2c0cb1b017ffef1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:16Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5079600543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfab3ba469a9487acdb31c56ee8745089310899aa64cc304226dd1ad8feec60. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/ES5078800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d4c44aad870d3695cecaf48e383d298ae6fab800dc9788183ec94b36265051. 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/ES5078800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355867867c8cccef4a8856883e34405433e90a20135ed1f3147f7cf6613cd991. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:07:52Z), 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/ES5078800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35999faff5f475fb511b9b4fce7d815fb891288356b5a2b16f2562cc73c7c715. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES5078800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276d0d7ca3338719770e963ba84c046f1a7b5ee6aa8bcfafc5bbcf1fd2717853. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ES5078800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df63a9963a9a050a3fac6e9ab239743b0af2e5e865ccac0540095bbb5209ec. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5078800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba8634510670b038f7812e91e424916278b2e1b138cf0890297889c8e9b9a45. 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/ES5078800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994e6ca18085191de2c55b1fbf856aca12dc9312f32120ebdd3138e1ceb9ed11. 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/ES5078800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47df63a9963a9a050a3fac6e9ab239743b0af2e5e865ccac0540095bbb5209ec. 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/ES5078800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611e751554507575d523176972faf8073e9ede61b2d85790f0b2176e3eee2047. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5078800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1562af534df6b38517550b7b8540a9ab982e22f12c313f63b9a7c99d9bb2e9f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5078800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367fb75fe94434154de72dd2e540e1cd7ecac6e811a1de678e3642cf53349405. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES5078800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c00cabce5370c963279d9d957d11bcbd1e225b6fcdc5973782603059bd5c3c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES5078800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5c92278849cac06ddd444f0cd6429d1ce89146d5e45d36ef44f6e1c408fdfd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:44:41Z), 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/ES5078800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38cc50f8eb1c2060f8927c2bf61810d6111b3b7775c6e31424874f50584efe8. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ESA031424141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d9315564b8fd3defa1d6e88ee78d2c1af34ec6766dd9d3cc9f169bed97a22. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ESA031424147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1d45f2900034727959c50d60ee45f3d4607fb8693b3bd46a25eda24fcee36a. 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/ES5089800443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3617ea4cb595b633732f1df637b8091122d4f2dfc57d7a6478afa597376180. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ES5089800447.
Al Alba [Especial Rosa León (Actuación TVE)]
La Palabra Más Tuya. Cantando a Violeta Parra, Gloria Fuertes, Fanny Rubio, Gabriela Mistral …
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7c4e8245870dcb6a738b592f8a4bcdd8c0893d1a95eab8e2ab2bca154d7712. 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/ESA031430103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611e751554507575d523176972faf8073e9ede61b2d85790f0b2176e3eee2047. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES5078800085.
La Palabra Más. Cantando a Blás de Otero y Celaya
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ccce1f7a6916be1027e41023986325f20bee05fce139dd77ea5242e67364fb. 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/ESA031430066.
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