Alfred García Castillo (born 14 March 1997) is a Spanish singer-songwriter. He gained national recognition when he took part in series nine of the reality television talent competition Operación Triun
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 0x17700bae66875246cdb54031dbd7686f23db9c527787ae73026504cefe5b8f43. 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/7e26a749-b4ef-41ef-9056-00fd26abd44f.json and https://artists.proofprofile.net/proofs/artist/7e26a749-b4ef-41ef-9056-00fd26abd44f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Everytime You Go Away (Operación Triunfo 2017)
Everytime You Go Away - Operación Triunfo 2017
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 0x57ea35ce032709ffd1092d6c6d8c85f17f497ff56c7d4b30dea89a33160a443b. 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/ES5701700880.
Amar Pelos Dois (Operación Triunfo 2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fbeffc2de45305ee48b095d43bc20655604e87d16470304993aecd4dee3ec3. 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/ES5701700970.
Solo Si Es Contigo (Operación Triunfo 2017)
Solo Si Es Contigo - Operación Triunfo 2017
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8358f43c94b2c62cc90b7a32c8a83243b7075f108976740c8cfa2a67e4223a. 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/ES5701701256.
Get It Together (Operación Triunfo 2017)
Sign Of The Times (Operación Triunfo 2017)
Maldita Dulzura (Operación Triunfo 2017)
Todo Mi Amor Eres Tú (I Just Can't Stop Loving You) [Operación Triunfo 2017]
Que Nos Sigan Las Luces (Operación Triunfo 2017)
Georgia On My Mind (Operación Triunfo 2017)
Don't Stop The Music (Operación Triunfo 2017)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a39a386db888d759fc8c8805492c0501420e34fea20c5c9d11f86a831f3109e. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ES5701800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9aa4b9c1a832c417b742e8f4a84d570876a81e03727b5ef033496489765b37. 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/ES5701800029.
Todo Mi Amor Eres Tú (I Just Can't Stop Loving You)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201a69cdd40655996aace51257a171203bd8601e1fa88a541b2bbd4411790927. 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/ES5701800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8d2d7a22bdfe02d5762722fd3da9ee5ded2d1b01758dd5662f9b80b8bba6f8. 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/ES5701800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e564aa3c7f6bc93344ab4f0bc19ba1cb4b7f0b6e39839cd8f59f0df6f646acb. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ES5701800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8358f43c94b2c62cc90b7a32c8a83243b7075f108976740c8cfa2a67e4223a. 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/ES5701701256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8882770a6802c3c53b3d1f003cb90ff5c5399b155dc78324018cf423fb86f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5701901121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca362d1ddd885f6a35b5bc970f57654771fefad07fc1fe9aefd59479c08af273. 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/ES5701901122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0c621952e578d5dd903a10ebd767ea36d5ab4124fb58a528cf6d18692b5166. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES5701901123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aae6f094fea2b4d5f0686a74660573e94ef67b7b416344cc2a6a2b67b326a20. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5701901124.
1016 En Directo: Fin De Gira (1016 En Directo: Fin De Gira En El Sant Jordi Club 2019)
Madrid (feat. Dani Fernández) - 1016 En Directo: Fin De Gira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216e460488bbdfdbeb667e06957431a89b2f58d5971d2942234852213adbf519. 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/ES5702001004.
Los Espabilados (Canción Original De La Serie “Los Espabilados”)
Los Espabilados - Canción Original De La Serie “Los Espabilados”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a76bc47a528195a4e428de703da5bd70d5e7587b14f8668a9b6926925d0fce3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702001917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd120b02f48776a9f17270abc756ad9bc83c9d68401d5522e5b6e0e9a69545095. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5702002356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f7d223bbe8e6916fd8ce13f78c898c3896d507d6d24438c5a6dcca6e6b0b4. 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/ES5702002358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3408a21039033de6146b503f9b91ba2eb21e15727925f40b69c62def970b4935. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5702002334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd120b02f48776a9f17270abc756ad9bc83c9d68401d5522e5b6e0e9a69545095. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ES5702002356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8098c9c639aa263b89b136cb525d2a7b075cf2091232cad7252377dbf67048eb. 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/ES5702100956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037f7d223bbe8e6916fd8ce13f78c898c3896d507d6d24438c5a6dcca6e6b0b4. 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/ES5702002358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52020b0bcfbf02a528b680a7928da910d7231e04b1b6fe38ba8124e6d66c8a8e. 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/ES5702100957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a76bc47a528195a4e428de703da5bd70d5e7587b14f8668a9b6926925d0fce3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5702001917.
Si Algún Día (Con Albert Pla y Judit Farrés)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06febc62664282f38efd9c20857af335b5a5b4af70d88f758691dc7ed839269a. 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/ES5702100958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ef42ab6d92a4ed77d32ef7092a8fe1db538a3491c8376ffd9c912e3b1ea092. 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/ES5702100959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0f97059741385ca5145e9c0fa5d5812ecec8f8404dfad52bc9192c285c48f3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5702200879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0a47b9587abc537fb5a6a733f23828f7894d30f0b3fc2046743ac7411fb2ce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES5702201531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8358f43c94b2c62cc90b7a32c8a83243b7075f108976740c8cfa2a67e4223a. 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/ES5701701256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fbeffc2de45305ee48b095d43bc20655604e87d16470304993aecd4dee3ec3. 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/ES5701700970.
Cap Nen Sense Joguina (La Nit de Reis Farem Realitat Milers de Somnis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a68bf011fdd9a01f443c0c6b3fb843eb5264a2d971c8100c3be79dc211210c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES17D1800597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826d91d431a7c0d28acf940e0e27bd88114d438acc818bc79de780cfdea7dc67. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5701701172.