Extremoduro () was a Spanish hard rock band from Plasencia, Extremadura. The band was led by Roberto Iniesta, also known as "Robe", who is often referred as "El rey de Extremadura" (). The name Extrem
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 0x999d4c759dc6ea962fc1c11a5ef4f75282c5b8173020e376a91707c047c8142e. 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/fc945f2f-c13d-411b-8e0a-0c57997c28e1.json and https://artists.proofprofile.net/proofs/artist/fc945f2f-c13d-411b-8e0a-0c57997c28e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No me calientes que me hundo - Instrumental
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 0xc048a53cb68258bbaec84f22ef306a8ad4ca01bef8fc89ac8d9a654e76f63aec. 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/ES5010400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe675764f1b5e6c3b9fefe31793c3238206d69af7398d414ac85ae81ffc44a2b1. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ES5010400431.
Pepe Botika (Dónde están mis amigos) - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992f558b2174c6e943ee4651129ed8b8a8f324d7efa97e7b5d51d9c68a09cab9. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/ES5010400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35485db31b694c07e49f06444185d2a1629eda7af9c1f3a8240cb5c59dec86a. 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/ES5010400433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2056f21aa13d86355c1240e8e205e146a6f826e953902663c7dc451caeede487. 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/ES5010400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431a0774abd83f61306e01256d10ed3aa5e0abfd7bf4315d4677b42259a1c6e0. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:25Z), 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/ES5010400435.
La vereda de la puerta de atrás - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8e0edf6a2c97a0f95bdb3602ebf72e56993f2444630892f7fff218833760b8. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/ES5010400436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211267204b54d25d7c9e67e128eefed949a1ed6ca27d955c9abe83880c3ca858. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES5010400437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0578aa18d3d276a38f083d0a611303738e9e1171bd15bc5d81d299cdd1e52e21. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5010400439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11c72a593488cb13e47ed7dc9b15e8c784d69e101debf9d1824507738299ce1. 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/ES5010400441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f996140eeb048e42880a20ffe006f2c4d74eaa01724d2529a44c07681987e8. 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/ES5010400442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4a0a66b93551c256edec25675ce575dd1f68390016bb32a0c6a0fabc8a59f1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5010400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefd3a93aad456bc9ad6ac363ab4b5688ff85639c7eb3788dd7abd34dc8d95e3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:43Z), 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/ES5010400444.
Historias prohibidas (Nos tiramos a joder)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2a2b3ef0f8b477937ae127eaadaa6f6bed7176507e8942dd43659a0c060c9b. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ES5010400445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f2bec6535c84ff0952912f5d4050dd112014c6bd89ccf323fdf50d579e5462. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ES5010400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f76f6d427febed5f0a8e874f90a4b08b471348d24d837602e812d8a93d58566. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/ES5010400448.
Experiencias de un Batracio (En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33d8ecb18064b329a5b8532af4b1130c1f198b092c3e3ed1baf8258b897613e. 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/ES5019814001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd6a0930c27c28196dc534960d6a85149f8f2b9d158aab86d7292b8bfe7e6bb. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/ES5151301879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e2e5921063847e292b70635f9720f6ad618155935324e7df7b63f5477b685. 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/ES5019814000.