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 0x75cf153b110e6c659a3d550b0aa91aa2c1c5656e922861f7b7bcfd48e826fe64. 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/5411cd87-95bf-45f6-b995-b977f6e6517b.json and https://artists.proofprofile.net/proofs/artist/5411cd87-95bf-45f6-b995-b977f6e6517b.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 0xeb3109ae01918f4ef0cb2b9f64006ee22e91eb89b3ea5ec77e5721955cdd5c07. 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/USCG61900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43ab0febb2616c996879ec958e6be04f33ef857549a8812b300ee48a60f0506. 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/USCG61900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cef6ef0e3b63d442bf2dc0a1c60f62be810d623e675f02f1a5dcc15b663ddd0. 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/USCG61900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51dc0b35044d2ee610b2732be175e1e76c06130f6ee237cf037c3b981bf86bfd. 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/USCG61900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73db9fc30382f30dd8cda41e5678a79c9e2929437f2f90fd50fb2edb8b7ddadd. 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/USCG61900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfdd95dcc25dc1390db5874b504bcb4dad93e90b4d93e282303dfdf8f6c60c6. 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/USCG61900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ee27b89afe128d0fac6fc23ac032b8279ad02f91f62715693471a1552772d7. 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/USCG61900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84273c290d9c128378b8def78a42fab7db61c7ceec37f983dee7ea8e7851814. 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/USCG61900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb946876c037c46267d72f636272c4a6fdfd8c766eaa2bbd86682d915fa5e2f. 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/QZ2J21507455.
La sombra de tus alas (Versión Acústica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa8ccef51b4f22011611cf846a9e0ddf1f5e55fc8407a1d2757f2b55e06cc36. 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/USCG61800093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970eec5494b62f901da4c017fd917e503d3d94730f6d3ff33f6a1e6eb000827e. 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/QM6N22595288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df4419f5c5972cb52479844e1fdcc064eb5f30cc0ce92f3bc3d1e9d6db9d401. 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/QM6N22595289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19848c89765755b108b018d1f304256a4feb0157d07bcd7cbf709841d01b040f. 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/QM6N22595290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db7c3fb33a3e4f527b2d97777c84db15a39de23f817980d83832a2e3475a820. 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/QM6N22595291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a43800f797b3ec7840cf71fc63bf0a75b4095e2124afa1062f9464f3c92dc03. 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/QM6N22595292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e231bba87e528f0ed3cb4b2ce6532b7d77f22ae70d8d48dceb9313432d4935c. 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/QM6N22595293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3bcb73be2eb98b99e8bf23c38bf4aec8c91e5b0859c6f86f3735037413a76c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QM6N22595294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea3877313b6e05eb1ae87c5e34206fe31332cabe8d8cf422dfea38f4c6f254e. 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/QM6N22595295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88f4829f620d4b78ef97307502c24effda7583b6c6e4f928c5a497383b2b5aa. 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/QM6N22595296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff61bc534ad643be89ab8e4e2de140febe2e241d9dc3bbbdd333f311b0e2aeb9. 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/QM6N22595297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be3f9a2fa839a8af5422fb65aae46805e82dfa060294ca0aa8492986fcaf3ae. 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/QM6N22595298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4644f3037899a5b2ba51935eb33224d3c424a41c486330e1bb9a84e806d9627. 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/QM6N22595299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6411d8747af30fef21b35bf63f44d0aaff7f086ccd3f2c2fd2a29d6e981c9ffa. 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/QM6N22595300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251f1e181f603fdc8f58e045dc08d5a889e5210ad4ac5a08a423c583ec7bfecd. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM6N22595301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa665484bd595e7f30c822d8724ef3a8845baae6dd7a641f364d5e9b20451581a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QM6N22595302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a51c6b16a782744baaf1eea558cff03f3e1c81e7a0e3f7235fde8b4d72afba. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZNJV2557882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f665faddc4bf040f398ed261b404377be5e7949f24091d309b66eda8129a462. 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/USCG61800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14212f8110ee9d166f2dad80b385ed697fb4aa340e2acdeecc9364652ace2e5d. 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/USCG61800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda1964c32ae6b5097024ed47e1739b8885d201e4b9be6d0387111099094f382. 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/USCG61800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8339ef8fc8bbb6d6b8a9dd4208bdfaef23726663efb3b0033a8d8642b4038b. 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/USCG61800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c698e5c1f6489df9cd00ec4a1089895bde6eee79f324a87522a087503f831a1. 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/USCG61800092.