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 0xfbde0a046bae120eb29e0f2409914059582eb48356296aed15a7e4454652317f. 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/3dd50e80-8d20-429a-b0b2-72d709508d28.json and https://artists.proofprofile.net/proofs/artist/3dd50e80-8d20-429a-b0b2-72d709508d28.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 0x41aa8e3304666c2c1d6689b3cac1a7ab8570493d3995899ab039de5df66032ef. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/ES5700100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784f0384350a05fd363ddb06a5b398c8a3ad98c2a444fcc9a2948bd40c20c3c8. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/ES5700100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfad0c252dcb7aae6e91da52769421c3cfa17383187a6dc876c8e862c1b9176. 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/ES5700100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe4842195a7753092b8189a36f2f89d4375ca58a8cd828ed2d485ef3950bf82. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:28Z), 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/ES32E2000024.
Nunca Fui a Granada (balada del Que Nunca Fue a Granada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7932008850d3a1c6e4bf56adc767316c6b2a04b7ad8c810bbefbc3405c616d6f. 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/ES32E2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf610d611c1ec0ac46d8c770348325588ae99f4b6027b145500df0656638d26be. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ES32E2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9867220e5a4adc8fdbc599988ff474fe63971ff4b8b869b4a76edde732f85937. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ES32E2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605c7976ffe7fe870a34873437e9a6461776397bfbd73536405d0049e19b44b8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES32E2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846be35a61a61621f6dc41bbc05e697b8384ed1e433d3a630ba0153ed055fab1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES23A1314002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1918ff024bf5f6f393bcf192298c5e3834b5437dcce1278ccd3c615799dfbc2c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES23A1314005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148e9325edffe684af6b300aa0b1905607326574459cfa67174dabd591427055. 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/ES23A1314007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe7fece732be887d0a98f03584b122c5eed7493dde4232d05caef785572213. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES23A1314009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88c5a017d948503b6cc418da6ea61ec96e91c367ecef325e3846a69b2b6b203. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ES5702100317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56fa8d638d1bb5df199c11bb391de9c53943c703a6062d33ff5f14fc54233e9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES5702100318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67582e69bd84485ba8524abd45c4a5ea548c687a324f9054377b1d90b5173158. 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/ES5702100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d6fd527b37c69ff19efa4ef3b8a43b6c4aa2500f557cd39669643c95fa8c8d. 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/ES64E2332341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bef0e53a65a2efc899360b031cc6f9a877278ca4cb3ebf2fd31645ea6af611. 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/ES6971700212.