Azul y Negro is a Spanish synthpop music duo that was founded in 1981 by Carlos García-Vaso, a multi instrumentalist, songwriter and producer, and Joaquín Montoya: (b. 1950 Cartagena). Career Azul y
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 0x2b13f64cefd4aed2e8b0310190d47949a500de00e8e3bd9224a7b5d3e60c395e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85c130a5-3505-4749-9379-6780e4dcfcb9.json and https://artists.proofprofile.net/proofs/artist/85c130a5-3505-4749-9379-6780e4dcfcb9.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 0xac1a1c472d7e70747db289577d47f7d15d1f44cb9eeabaa716d85cf514874951. 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/ES5009700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da660f17eea8162610954c70bed6717d9ad7a63749ace1f847b524dbc93faf1. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES5009700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1755b0317ee126ef134313fd6c98141b0f05ffb9c4cfe162a4a02fe103f2c6. 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/ES5009700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5071207329d21dfb61c9d0aeef2d555dfc1eb75c631dfc9f8da23fed162d60. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5701600918.
Con Los Dedos De Una Mano - Instrumental / Remastered 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5578133a78d527264a534863fe33715d162b199ef0cc1d800ba66d28c83a0299. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:49Z), 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/ES5701600920.
No Tengo Tiempo / Con Los Dedos De Una Mano - Maxi / Medley
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b8c37e2d9525b625742fd485f3e265419b5b68c4579309d7cbd307d636c12e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:44Z), 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/ES5701600926.
Me Estoy Volviendo Loco - Remastered 2016
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7444f53c71cfae036a34c6af7ffaa3fbab14f57d25b9ca0bb60f1ef95965c8c9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ES5701600914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b2405ea68ddafbc3c1d04c19cf5024c505b9e8d1a86e43f18fa00d805c2501. 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/ES5009700045.