María Concepción Bautista Fernández (born 27 October 1936), better known as Conchita Bautista (), is a Spanish singer and actress. She in the Eurovision Song Contest 1961 and . Bautista moved from h
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 0x4a20b5f0894e5e0407ef0ce2d1052e1b4781d5a44f5af7d408da972a20f1a1bc. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29ec3549-2908-44f1-b117-6cd6cea0e1d2.json and https://artists.proofprofile.net/proofs/artist/29ec3549-2908-44f1-b117-6cd6cea0e1d2.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d01a4bb21fe19ee67e9401d6f48651c725feb20eb5b24b8bd1a17a95a8996f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:41:42Z), 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/ES7580501676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f328aff2f02ff6c0da35827a72d5ed77c724e41de14ed8b13c6e90a72c6aa04. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/ES7580501677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8e06fc40f87d34051967b0287acf76c9f2d28aa9c604ba154b0b5c6e7c78b9. 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/ES5372100181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160b26d207bb9441f4a3e9cb378a842bef3d4219cb9fa60d973b4800903d9c88. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/ES5372100182.