Natividad Macho Álvarez (13 December 1928 – 20 August 2017), known by the stage name Nati Mistral, was a Spanish actress and singer. She won the National Theater Prize in 1997. Selected filmography T
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 0xb4e332be778a8b35aca7002864a05628fca5e426293b007a2707c1a91a90510c. 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/c514e1bf-e450-436f-a503-2a4f2f00567c.json and https://artists.proofprofile.net/proofs/artist/c514e1bf-e450-436f-a503-2a4f2f00567c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
El Hombre de la Mancha (EP) [Remasterizado 2021]
Nati Mistral (1969) [Remasterizado 2021]
Nati Mistral y Los Gemelos (Remasterizado 2021)
Nati Mistral (1975) [Remasterizado 2021]
Canta al Amor y a la Esperanza (Remasterizado 2021)
Nati Mistral Vol.1: Todas Sus Grabaciones (1944-1962)
Nati Mistral Sus Mejores Canciones Vol. 1
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 0xeb5e558f4c9a7cd23f15288604176d11db4ee8bd1f73fb21b168d68dc250b43d. 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/ES17B1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3306a424dae885efd910475389f47a56f7bf0f4c5e8a29a111e7ba70f14b3e. 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/ES17B1300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6388beb4cb62bd2da1404e5777827979dce1fcdc3ac4aa55cfc6c19741a17e3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ES17B1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3306a424dae885efd910475389f47a56f7bf0f4c5e8a29a111e7ba70f14b3e. 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/ES17B1300006.
Cuadros Disolventes (EP) [Remasterizado 2021]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe7f8fead208541eeaae19abd5642bc08548cf0d28ad81f78049e47251d63a. 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/ES7580700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75049c07205f4419e5dbd76234f21893463bb185f31e5afe8266f38231f3876. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ES5371500169.
Grandes Artistas y Sus Mejores Interpretes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf221692181ee50db07732a1358e59fe0986b752593fb89912f42553007cd1995. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/MXF331201253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd68f1e2e6cfd8ec73aa5f866ded9d1eb9385c36bbc7ae3905bd4fd28a4a3a65. 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/ES5028900327.