María de los Ángeles de las Heras Ortiz (4 October 1944 – 25 March 2006), better known as Rocío Dúrcal (), was a Spanish singer and actress with a career spanning more than four decades. She performed
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 0x9656a9e75edbab1312aa7fd00441cad9e348786116da2cafa8cdf9602774372f. 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/d4fb4f99-46c0-4e32-b32f-7214060a3542.json and https://artists.proofprofile.net/proofs/artist/d4fb4f99-46c0-4e32-b32f-7214060a3542.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pop En Español Para Bailar (Streaming only)
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 0xb9cae0d1cfefa0d877c100621c6af5596938b04097667dc507aaf5ace43b036c. 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/MXF011200278.
Una Vez Más (Like a Child) - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d52f3ed3d5b40e5e27321ef3d20619cfa3ff4a01d3140257e8d3eeb5da502c1. 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/ES5021901614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dd5b86d14bb0551d7f4c4657cc0940af0b89844675d506363cc9568dd5e7cd. 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/MXF018901036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dd5b86d14bb0551d7f4c4657cc0940af0b89844675d506363cc9568dd5e7cd. 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/MXF018901036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda7eb24d6699fc0bb22e8ac2633282b14d151d563fec4464365d441af38d6cb. 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/MXF018900218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cae0d1cfefa0d877c100621c6af5596938b04097667dc507aaf5ace43b036c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:16:38Z), 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/MXF011200278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d284e411012d128d15def987e55c5cbf6fe77e5f17b626c126241886af10695. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/MXF019600068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60314bafcf80ae3215ae369d16e8c74f28c44cc4fd4c68cafe00fc918bde4e78. 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/MXF018400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33c4a45d8b35c422dfacb838f71d83116e0255b8402a84c23646cf85348b541. 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/MXF010900438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9540e2dedd0e9f6eb98e2ea36be0143b9506a1e88172a060aff8391daec9742. 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/QMBZ91345366.
Roma (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57f585a0f67ccb3e421f77336e5e323da591187afd744ff1533a63823db9749. 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/ES5709902042.
Te Quiero Mucho Mucho (with Juan Gabriel)
Tesoros de Colección - Los Maravillosos Duetos Que Siempre Recordaremos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936353c6a12c465ca5c0a9346b5b7f6ce76901014ba44818f9926211de88ae4d. 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/MXF019701599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabccc7992997941de7db2b0cca68e16f78fc7d22c22f0f8c4c33d4c52a935541. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MXF019700244.
Como Han Pasado los Años (with Julio Iglesias)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3ea18dc1c94b18105c0514e1bcf78a22829b2b56b7ac72948b428134dbbef8. 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/ES5021000866.