Eladia Blázquez (February 24, 1931 – August 31, 2005) was an Argentine tango singer and composer. Born in Gerli, Buenos Aires Province, El corazón al sur is considered her most popular tango. Biogra
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 0x3013e24cb1060ef5799dc0896227b2a0c045638aafba439718a2c2c78a499128. 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/f42f1a42-0377-4354-951d-cebc792547b8.json and https://artists.proofprofile.net/proofs/artist/f42f1a42-0377-4354-951d-cebc792547b8.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 0x92f01454932dad25ebf316343d60971de6ee4f53e5826062e8237cd3e850084e. 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/ES71G1608482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf474d484489966756d4c80ff72030493468f626c889ce4c3d3b822d22b3597. 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/ES71G1608484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a1f7e968963727085b0b385d3e93a7764ce4b37d57f55f3fff7fd19d2c62e1. 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/ES71G1608489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232ad380a23de5f375b1c4ae022265775e457f0cdd4e5bcf044487397c13b389. 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/ES71G1608491.
Entra a Mi Hogar: Cortina de Sin Estribos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfabaa57dd58749b2da7361af822dc1baa22edf784a191a340437511afd5d1c. 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/ES71G1608495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f032d8183853610c97675461501136b3efe923f73de8469579a6778a220f949. 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/ARG601011870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273cf25b75d0d4e4c45811385be507752a26d522e344a01965a15c444486c40f. 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/ARG601011872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164fc68885139d2ab26c7b4b716eb58ad5f8298074fdc6da3cd54a94bbdf6c0a. 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/ARG601011879.
Una Antología de la Música Ciudadana Argentina: Tangos Clásicos (Misceláneas)
25 Años, Vol. II - Coplas de Plata (Dúos) [En Vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e98250b91e1e4f9e071fc9d6ab033717d403f8aadaebc8f8e6aba1a756e0a19. 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/ARG601012965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3c058c63cc55776379484ff4578dc9a018b6f17021baeaf4ae33c23708916b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARG601012966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5325639ba71eeb51a0b5dd41ccc113bc70af45b1b2c4a189487870fb9992ce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ARF048100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e90dd925eaf1f15170c278c41c33605a9bb7aeb7edac78a7438295026ae001. 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/ARF049700942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa140d444c6182abc4cb27f322937e2b7c195bd6a3c39f712530ca1bb7fbd4b00. 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/ARF049601403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff24e67bad31cc2990c5dda3942c3910529b8e4c081851b5f6524380b98dbcf. 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/AR0941000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4842663dcb0b51c733412d9ee32f4269a97150f1f117b810e88d69e85b411019. 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/HKI190132902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec50ce9a66e625719059cf90224fc80b3b7f09e0bcef7113f825fdf56f493ae. 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/HKI190132907.
Simplemente Eladia / Un Homenaje a Eladia Blázquez
Choral Concert: Americas Vocal Ensemble - Lee, D. / Guastavino, C. / Glass, G. / Moraes, V. De / Stamponi, H. / Favero, A. / Blazquez, E.