Jesús Guerrero Béiztegui (born April 20, 1949) is a former Spanish handball player who competed in the 1972 Summer Olympics. In 1972 he was part of the Spanish team which finished fifteenth in the Ol
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 0x7ab524d07c9b478d0c6b5a2bfd4b306e8dd9b8ef8f9220c463ec7a3bc303d5d9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6275492b-c0c0-49e7-b69b-e61f1ac3c5f0.json and https://artists.proofprofile.net/proofs/artist/6275492b-c0c0-49e7-b69b-e61f1ac3c5f0.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 0xa2832f0467c701a87092146455921f4ea61b11568240062f82c4c8847c99fa99. 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/ES5301662765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8867f387052b28425aa23ad6fa164a754c3015b659ae3054f92e8f46a5a15e. 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/ES5301662771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910e0899d4c60bf1f291713b6bdb9345ae47fb71168fd2381e04cc4b0c9a481b. 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/ES5301662772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a62560067bdd333b14113988b7e840ec1f1516428f9c1ecc3cf5940e9757d4. 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/ES21S2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e55b4c1325e725bbb22c5e2fe9537d923df8ea610fa434a8a06c29938462f0. 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/ES21S2300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61c06b4550d5aa0199249ae5b3c21330274cf2e26946905d59b26382d9f4055. 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/ES21S2300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423ef9da823b17b5666db3e786c33fd8f56e81109f8ba922c5a2c99c3fd73e1d. 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/ES21S2300067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc72d52b818679c87c7185693645588db6680b6f990490febfa38efb180d6b0. 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/ES21S2300068.
Retrato de Silverio Franconetti - Seguiriya
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95278de1631cfdc85ecb228d73c8ba54911691416b6424e4c5edd89b770a5515. 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/ES21S2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefe8dfd162684cf848e46bcbce3195fd00bbd3c1e67455eab1083bf11bd97fd. 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/ES21S2300072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae03ea55db1d6b2f293110417a1b9b03d788e0180d3eb660afe6516108f04f. 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/ES21S2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b5254661fac09c9dd198bae8d5556200972066796a60dbc489ca4ec6ae54dc. 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/ES21S2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e196c9aca5eb80a579acf2b154e0e3def0b7d2bf5a6dd9331aa7e05728ce49a. 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/ES21S2300071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba394d79716ef21bc564fec1cd544291fd0b9f7df75208ca4d3b4d5d710c9c10. 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/ES21S2300059.
Canción De La Madre del Amargo - Bulería
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6f6d46b0450a7685b40bd039e178a7536f73df6ca5b4ea038572f7c4692dd0. 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/ES21S2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a62560067bdd333b14113988b7e840ec1f1516428f9c1ecc3cf5940e9757d4. 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/ES21S2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba394d79716ef21bc564fec1cd544291fd0b9f7df75208ca4d3b4d5d710c9c10. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES21S2300059.