María de la Concepción Piquer López (13 December 190612 December 1990), better known as Concha Piquer (and sometimes billed as Conchita Piquer), was a Spanish singer and actress. She was known for her
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 0x8516aa8c8dd33df701711924bcc17bd0a6bc2ae5cc47547d42cd902e00427e5d. 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/0406f976-ac9e-4cf0-841c-4a1a3d39f748.json and https://artists.proofprofile.net/proofs/artist/0406f976-ac9e-4cf0-841c-4a1a3d39f748.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 0x13b0e45f5aa61bf1e50de4e5c14c15bf718c69a39b248dbf53ccc86c616778a7. 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/GBAHT1303529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeb9f9fe7d930df8efa4b54c903f06cccf718abea3aa373176fb0ca4b80723d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBAHT1303535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c18b8591079d62a7d9a2629f8e454e380c56dae59845459ea6aa02e7c720d. 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/GBAHT1303522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fffa788d91323f905ddf5959cd90bb8eb65c4bc0a1514dd1d984adc952d455. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBAHT1303526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb241d6ba8930952980ac3df7445012f8e757ae0cda35e8f4fb6be64bc13feeca. 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/DEXN82361306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddddc282e66264870d8575552530de5a4380bcea242aeccd37914462fd174c07. 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/DEXN82361316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d80119edbfbc54ada2161094248a4a1ca0acc4ca72e364d5f3c2d3237e96e9. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/DEXN82361324.
Vintage Spanish Song Nº25 - EPs Collectors
Vintage Spanish Song Nº26 - EPs Collectors
Vintage Spanish Song Nº 20 - EPs Collectors
Vintage Spanish Song Nº57 - EPs Collectors "Canciones Del Espectáculo Puente De Coplas"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609bee1d5d30b427cbb6a0be975364b966d18a211e0e786abda7f72684a23826. 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/ES5026200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0f8f963ebc157d0e62249bb15ce7fa27bbb61ecdf82e675ff8bdd261ef175. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ES5025900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927341859360575caa96525a10c11c78da2adeaa7d085c915ef82db9bbcf8b80. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES5025800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54d11bd5fccfd95c4342fddf05cfe8594c62bb3bd4ec4bba2a3c268cea2ea53. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ES5084906676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb372eb3183e8476fe0e8531e7beefa12e9ec10ec67c0dcfbaddb174b233af7. 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/ES5085706685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646014639470b728c81c3a84b4e5ca750bc27ae9ede360deaa19dbe5eba767f2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES5270104701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7144b4717c3650671651a7bc0624704a2613438dc3c33539d82f6d4b3b624. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES5026100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa04eebb34e97479b71e4aadb3db7580cea762a23804dfe84c7df974016dead6. 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/ES5025900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a210ce189286fcde691a1a1d96237fc6ae7fcf9f97624345c9403119add66. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES5084106665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8e449c70bb9e6aa90d4f262f1624f039a52c7f97505c92b1627302ce07fae3. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/ES5085406681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6d560e03f7ac7e8104fa84568612cbbe33d70b6b6c79a99ad1367c8b1ac40b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/ES5084006671.
Conchita Piquer - 2 CDs con Todos sus Éxitos CD 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9244c03e0a5867ec634a0e6630f9dfd82c2f36d42febd806e3700c9cf4c0b5. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/ES5270000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5edfb0b219667e8503408ab991c6051d5c7ff0e043297d436018068febd8e5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/ES5270104703.
"100 Años- Concha Piquer Canta Junto A Concha Márquez Piquer"
Vintage Spanish Song No. 99 - LP: Conchita Piquer
30 Exitos Conchita Piquer (30 Exitos Versiones Originales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aff03245e269410e40a5944d3c7d48698adf5654c76a0a6c71df4125a3d6ae. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QM6P41488349.
Concha Piquer, La Reina de la Copla, Vol. II
Concha Piquer - La Reina de la Copla, Vol. I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64732eb502b7e3f5c40e9f1d79d204064f0f30d95b6f7ea6a561a13f5255d4fc. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QM6P41588452.
Concha Piquer - Éxitos Inolvidables, Vol. 2
Concha Piquer - Éxitos Inolvidables, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a73f0421eb3a87c3e9271db48d06c6795b423220c17fc8c5c30de0651d64d. 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/ES6601701421.
Coplista Universal - Conchita Piquer la Reina de la Copla
Romance de la reina Mercedes (Remastered)
La Habana Era una Fiesta (Grabaciones de la Radio Cubana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d1de023f12564ee6d527391668fe1b2b9de6b9338c1b6836b7293f2993155d. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ES5121000796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eaf8b42b4a54767a5641b0b039a85794400131ca2ff764e61ba3ea619c6d4d. 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/ES5121000801.