Sonia María Priego Bárbara (born 21 January 1980), best known as La Húngara, is a Spanish flamenco singer. Early life Sonia María Priego Bárbara was born on 21 January 1980 in Écija, province of Se
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 0x4559bb064c3ba0b349ec17853c45935521957242578ddc84cade8e4a72e83415. 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/5ef64627-4e5b-4b3b-85b4-f1adc3518644.json and https://artists.proofprofile.net/proofs/artist/5ef64627-4e5b-4b3b-85b4-f1adc3518644.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 0x7a0866754b5055515ae616803c629c325aeb3adc7151a48c5a14426f3c5167fe. 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/ES5022000718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1229fbc619386f53535b22a18c69b94923472fd44b320e6f0190e9cdd7f5c3. 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/ES5020900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713588afa30d5cc6a725a5f3fea0d35ee0da39429fc276002c33c8d543f3233. 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/QMDA72162600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4713588afa30d5cc6a725a5f3fea0d35ee0da39429fc276002c33c8d543f3233. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMDA72162600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4f2c41dfbbf28dcce57447ce5f766fc175728c5f7bad188699abb8aa659f98. 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/ES60D2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x435bb6989dd3afcf76baad6f545f5c07f37cc24fd2f89408a5fbf772cc0d39a0. 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/ES5152400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c47067045c18401a0e8a53d142e583e6235f95f85d84e597b425c69c4ed0d. 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/ES6671301675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c47067045c18401a0e8a53d142e583e6235f95f85d84e597b425c69c4ed0d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ES6671301675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5133e41546f61c9ba0b96d8b9c81f39df5c769dcab7ba14795c9d7df5f0ec7a7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES7311500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a05f7dff2d2c4a4080f2852ec6b90f9a2e2f616aecfd9449765bd37d8d536. 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/ES5020900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999211f8d6e944965aa7887f8452bf667e7ba2bc5ad901c52fca517566747c85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5022100912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df840701d6e0e9153a2ccd858f57a3539466f2de14175dbf4468e8d25abb46a. 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/USA2P2311111.