María de los Ángeles Felisa Santamaría Espinosa (born 2 August 1947), known professionally as Massiel (), is a Spanish pop and protest singer. She won the Eurovision Song Contest 1968 with the song "L
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 0x702c4f91bce4ddf5f3c48982b5147d3e12b2f616bbd3e1d22a3b9612e11970a9. 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/67c76ed5-f7c8-4403-8b22-7df1d1026d8e.json and https://artists.proofprofile.net/proofs/artist/67c76ed5-f7c8-4403-8b22-7df1d1026d8e.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 0x556515252630b0bb223e84b3dc84b3c507697e89171c1a391cbb88968cbee166. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES5088300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a2d8cba05654f3b13e320330e7962fed642c4b7efacebafaabed8ecd5611ed. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/ES5088303723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf949fafa04f797119b0766a7225941eb03d11f8dba9fb6309aa75e07d6c36cf8. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ES5100300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda640344a1f2996b11289b8f46428af5ef88c6a63408fcd6b7a643c88b917bf. 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/ES5100300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37146a278efbf8f29551efd4de845d148f726c323cf9578b06dcc1ceb9f78226. 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/ES5100300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c4306549ae57a4b6b6cbb6addeabb9873ef3c5cb35f957418ccce0b48f5669. 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/ES5080700240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7307266e73d92ac6bc6dcb586f99387bfbf4055c27434c036be6479f2098d8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES5088300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a8f48d03c6162fb9de813aee5968fc3c0778427cbd612576d87f951b6e4f88. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/ES5088300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845cd2f07073b7bd3aaa89911e193c927250e5727de2cff5f06b82c1a48eac7e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ES5151401376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bab0a1fe5dd5a00a244d43a13d1fb4edb657212b80c5a64c4e7973fc61abc4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ES5089700243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e48bc808c0a7d0da15508c2a01c9f55c77f332efab4665700ad2eb5185b57b4. 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/ES5088503708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd33e36d5df16f4cb36b02b36246e5c3b5765c3770fac42594045c58230e1ba. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES5151401934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce08c4a5e943785bd5a48601f0e947a6e79779a2ada257997dd6d7c21e2e800. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ES34G1300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222a518792cbef98fd2a22427f1fd4c26e219a213a1b316e512d29d9c51850d7. 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/ES5088403722.
Corazones: Corazón De Acero, Por Un Puñado De Oro
Engaños: Ya No Vuelvas Conmigo, Laberinto
Olvido: Dile Que Por Mí No Tema, Ave De Paso
Massiel Canta A Bertolt Brecht (Remasterizado 2024)
Massiel Vol.4: Sus Dos Grandes Álbumes Viva (1975) y Deslizes (1990)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ad064a478375220aead1b88df61f580a9e68895e94d38329dc0fc307cccbb7. 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/ES5088103698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633e79b34ebf58670b48f12207315153410e17f3a0ec28357965e892ac098f05. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/ES5088103699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5582eee8e441e18c3621d78264010e09b2357dcfb0e70546ff71a2251af5fc8d. 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/ES5088103701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a8f48d03c6162fb9de813aee5968fc3c0778427cbd612576d87f951b6e4f88. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES5088300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291ee108d0357a638035a3caf0871c2e5d0a207689de43d0bb2122a5c1fdff8a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES5089700241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1a5354786a6e12e5151876876e59cc7ef5f4d85f93026cea8055e02e5394fd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ES5088300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222a518792cbef98fd2a22427f1fd4c26e219a213a1b316e512d29d9c51850d7. 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/ES5088403722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cb9ba271b4c625d546a41298dbc29df116cd4673ce1bb3c5ee232aa8f3e1d9. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES5088403726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67de395dc107cc60053d7f53571747f999779a47d3f07c150abea5481b71be3b. 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/ES5088403728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b2a309af51e9e05e3c80b22286b17b860f4825f88168e4cde5dc83f4ea956d. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES5088603710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bf19f632321f7215d79189ba3799fccd6ba1efe99cbb6171049e44296a7c09. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QMDA71522911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1940e846bfcc45cdba5779a46aa2eb97217e21af8c0284c8dfc3c85e2c86f1. 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/QMDA71522913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7284e7f8dfe0d4e9d6453a7d2b6cbfc29ce1788a7a5459353ab0cad7f4f571f. 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/ES5088300035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a54f0200ae9836268a342b31a69fffa2701a546ceb3bfd56b677d1691af465. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ES5088103702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb698eca7772a1f9c578b284beb3b7a2f4ddc28ac8ed5ff774a433eb4d2a85. 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/ES5088103694.
Quiero amarte hasta el fondo de mi corazón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e7056edffc41f22420dbe8847cf271a8178ecf724664bb0904ac74615d4151. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES5088403730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777c7f8c51cae50cf569cb55f05625bb135afe98d9ada6c7340c4a05720bb977. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ES5100300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2bbd247d1c5bb5ff9c157c185c35825d5eb8818657aae4cd7cea6167a54af. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES5088103695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777c7f8c51cae50cf569cb55f05625bb135afe98d9ada6c7340c4a05720bb977. 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/ES5100300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c1017dbc095438dd0962a8953d8c70d38878f8890e57797a70d61dc180a8c. 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/ES5100300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4469fae60a5130242d8859b8b5a07e9df83dd504e53324464034ed66c4dded79. 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/ES5106800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bba7f94cf4d7c24fd0914911951826b6cb3efd56293d6f5a1639a3d987bfc7. 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/ES5106700076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c1017dbc095438dd0962a8953d8c70d38878f8890e57797a70d61dc180a8c. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ES5100300038.