thumb|Statue of Lobato at Plaza de la Merced, Cádiz Chano Lobato (December 1927 – 5 April 2009) was a Spanish flamenco singer. Life Born in the Santa María neighborhood of Cádiz, he began performing
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 0x9cc10ef68f36e14f479a4cde05405e0b5519a4b525908a7f3a5f80bb30123678. 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/7bc3bb5d-4911-44d4-a661-13f9f7af352e.json and https://artists.proofprofile.net/proofs/artist/7bc3bb5d-4911-44d4-a661-13f9f7af352e.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 0x89b6c55b361a8f2ba4cf6df61448cb204bab716cfcdd880a4019ccb1506d19d0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ES5089906843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d74b374738947181b476ab2271c2e0daf63eab3fe14acaceccf60373d40dad. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ES5089906849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a204c0555e530890b0851a5c75ab36b8da01a139bd001349899aed16067531. 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/ES6410001302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b918f9ca79cc1971f4133c6c510180987fa3e31bdada36e7d9ed0dedd1f49. 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/ES6410001305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf48e36644aaa9dd7c0b0aca45b79f48c29a78ed0e753f8bf681ff72e88c17d7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ES6410001306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ec92cb5e8fd450b876fa2c25fb8bbcf1bf280e8c9b703843a502fefef2a3ec. 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/QMBZ91429196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448425ac75e9aa7827bc012096734e06db3fa0182bcc4ac4da9fb92fdd9c6a64. 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/QMBZ91429197.
Mi Sangre Era Suya (Seguirillas Antiguas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177fc8b5ebcd5140e38d0c68076f776f604d7e43a098010cb5f54223b9037323. 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/QMBZ91429199.
Cuando Digo Lo Que Siento (Soleares de Cádiz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3371259c4de9928e2ef26a9162b8b648108c9277538958a5b7ee7d73532c017. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMBZ91429200.
Tengo Yo una Torrecita (Granadina y Malagueña)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac1d1b10bc04158c991c048a859e039fd2c45f82a9fe8ddf4fd79566faaeb91. 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/QMBZ91429201.
Que Tú Perdiste la Llave (Tientos Caracoleros)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c470098f11bb7031328d106b5f08e665cc41ad9229c49ad4ce24989f4ba0c3. 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/QMBZ91429202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac46e819d6758c0ad5a714c455a0098f1c79834562e0e55f45f3cff79dd53533. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QMBZ91429204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea828b46e81a12cb7c91473f053c534861c2b343013e9663013a05063d7e40. 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/QMBZ91429205.
Mi Padre Llamado Juán (Cubana y Colombiana por Fiesta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d79146e0972e6232cdcdb4c6205fcf5fc219d18f0bd41da58a4bec3cac61ac. 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/QMBZ91429206.
Gaditana Tierra Guapa (Alegría de Cádiz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6505680c7a3b0142ae8b5f200d277a9483a8ed8f9a6f36547d20aa94b58f4ba3. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMBZ91429207.
Me Miraste de Reojo (Aires Gaditanos por Bulerías)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36c5370ab2a594a7080813fc6acf556011f04c57f8e703bbd76aa38df5b9eba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ91429208.
Homenaje a Concha Piquer (Canción por Bulerías)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651263b0de3974e99ee44451ef1471db93f19e4f31f765436318aafcc55a6d6b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMBZ91429209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1100ebcc68860cc37c061dfeb5319617b9090dec4852386fa7083b11fd2df660. 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/QMBZ91429210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c46de3743952bd4e3ec7392eb0ec3c6bdd564d0d9a9a1f43347b2a6cfed6e2e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ91429212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5ec024016688be49c46ab947a5265815cffc9f935991058df7efcb5a639286. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMBZ91429213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab661f1692dce1f2fa8145e392c3b6b32623a69f65e03dd5d991ecd1bb836b5. 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/QMBZ91429214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba5e6d7bef5970a9fdc728d030b626b6a2828406771051996d5610f2f8e5ac6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMBZ91429215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c20d308f51d93de759cdf59f650feb35842d4456116d6ed14d22d454a583f0. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QMBZ91429216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad70d0cd572b2afee1ba394a9bbfa04d8b507ef80c43cd18ce2c53427d49f2c0. 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/QMBZ91429217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17a13970ef1337ec95e4d1459a2ced25ea689a4a176462a2a79b16203c704e8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ91429218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c67e7c95d02005704152e9644056aca5fa1c79298c9c3d067d3d9c009405021. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMBZ91429219.
Adios Málaga la Bella (Tangos de Málaga)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4cd15ff8fe0bd0cb7b65950517713ad3e5b09dc11912dd72ff1fadf82ee080. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QMBZ91429221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b6c55b361a8f2ba4cf6df61448cb204bab716cfcdd880a4019ccb1506d19d0. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES5089906843.