Manuel Serrapí Sánchez (11 July 1904 – 14 April 1972), better known as Niño Ricardo, was a Flamenco composer, considered by some sources as the most accomplished flamenco player of his day. He played
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 0x7f04f614ece9efba957c5be305965a22a5d84534b0059905568b63e9a2efa4d1. 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/33c325b0-8498-4f9c-99aa-f1e0637d3fce.json and https://artists.proofprofile.net/proofs/artist/33c325b0-8498-4f9c-99aa-f1e0637d3fce.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 0x6eab2dc1f0006a603cbfb8e27a6c7f6e55563f604d04115e47cbb32a1d15e6ca. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DEXO52492286.
Vintage Flamenco Guitarra Nº 14 - EPs Collectors "Toques Flamencos De Guitarra"
Vintage Flamenco Guitarra Nº1 - EPs Collectors
1º Centenario del Nacimiento de Niño Ricardo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa210babf5bcfc0eda9b17e2e43305636737850e5a2e6b8cf477370d8ab280d5f. 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/ES5270900505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3844aca3a714e9f94cba0bb6acd17134fdaa827bfd6d554764fa3ce0eefadb3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/ES5270900506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b77d7199a00e013a27a5b7babd29da040f4be2a79b052d0de921ffbe1dcd0f2. 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/ES5270900511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc294a4709e7faeea345e66762877bc17f464163cd2b4a4556cfc9fe9f200d472. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ES5279900513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75be3c721ea92cc11f98bf1616e176179d20d603fb87929d3766027ffeb816d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES31E2403583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189cbdca800e7966737009ae60e07e23bc4dfcf66f278e9d24a28ce936007b7a. 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/ES5271502801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173c1bec6e4c00d114f34a645b2106ed79b2355cd14a3b3df1c15b87303ee4e8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5271502802.
Si Te la Encuentras por Ahí - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35a0db18fa1d63a2ba93f943659ccde826d41fcd508d4f8077acdc8b3c965d8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5270105404.
Una Túnica Morá Con un Cordón de Oro - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdaaa1f102e3a3aadc9e906e55e3b491a5c74ff8745c8312e6b367e7eee8bf1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5270105405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46ac1e6b695452566de18b582327af17906e00d3dad5ad45cecbb30e7d5d556. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ES5270105406.