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 0x5ad5ed28747d1f263454c7e51c661a0bda7d6e1793e6f40bf27aafa9eec14997. 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/8d9cd2b1-f11d-4c29-be1b-dd8c1b94ee3f.json and https://artists.proofprofile.net/proofs/artist/8d9cd2b1-f11d-4c29-be1b-dd8c1b94ee3f.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 0xb800892cfbc3d279a11b25a1173438b2319068bd23c759ea86e52fb85f09c5f6. 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/SE6I31960887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fe594e488ecb81124313e60a84420043b305fc9c6f15c1f2188e3fbc5656c8. 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/SE5BU2087521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d206cda2cf7a8b5e752b966f3961d7639aa2d3a876ad23328a54086f6f322d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/SE6A92065017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf001fee192784df2c28ea59bef0f927e7cfcf1f92b5654672bfafecadad8777e. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/SE5BU2115562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013b329be90863ff16e8eeb8e14edb0217139d3f517743d0f43103fe26364035. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6QE2135244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19884e36f39141625821c3d63d648e44c2b6bab3fed131654bd7a99a109862a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE62M2110250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad2c244944d3a62163cd228bad6bf2ab8f038046ce7533788d82a923d60fe2b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SE62M2132718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d84a92a958c5abe0c3c5e929751965c211c9344478351616c7144b30d68138. 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/SE62M2132720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c3226d15b7d59e18386cfd795b095d735d39387f7b4dc64d922f710a8d1c29. 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/SE62M2132721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6c2a56a9542473d08534a62bb4295660004211a4029f78c3e77d963e8e2bc1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMFME2289592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f65bfb62c45599c6d4d44f011dbedf0d1b631d10bf0febacebd4a03baebfe8. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QM6N22479346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dda0233d3ed564dfed52d5c5c14f5ec465529caac085e4ecda7f9731ccbce2d. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QMDA72459951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461413dacb04258bd404cd429770e3628516fca37c3ffcc07ba8388613e13fe9. 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/QMDA72459952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f896ddd08252c2499c434cc31da1cebbc53b0eb7c484aa6e583dc3e7141911. 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/QMDA72459953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3fa7cfc71ad765587f810bb418c2d5908e7775edbbab8e193bffc01b3f35d1. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QMDA72459954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8777ccfa6590cab368b1b7e0ffe15849fb81623f0d889df6a83fc8a0e21561. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QMDA72459956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bef5015e0a802ff3564832aca21e6f2f59d8439b95728ab2de58eb49468e52e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA72459958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8152a455f050ef065f93c2f65b6fa84b1c0e960f6714ca056697192166a50721. 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/QMDA72459959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e898fa915043f5d4ab4a7f62731b10965ecf7856d336b7966290199e0744bd. 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/QMDA72459960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6536ba624ae641255ccef23a0fbdfdd17910594d44984e8130830fa939bd63. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QMDA72459961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf43a049ab2cf72f5be47ebee3ec400a96bc394c2dc238321141412bc90565. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/SE62M2290914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f20314ebc1755a972c1e38bc2fcb6805b38a944171aa3000ead2c5ebeec83e. 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/SEBGA1902162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf43a049ab2cf72f5be47ebee3ec400a96bc394c2dc238321141412bc90565. 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/SE62M2290914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a00ec92bbe8196d2dcb40d840894aa279661334bf6e0d648c4430b360831807. 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/SEPQA2400157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a5c945287971fac41d249b0e5c6e77ac2802340f86d73c9c7922d074205a03. 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/SEUM72301367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5742b07c2d015c2b69dd1c3de42a0220fa024f622ada339218abdad5f944b26d. 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/SEUM72101873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5742b07c2d015c2b69dd1c3de42a0220fa024f622ada339218abdad5f944b26d. 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/SEUM72101873.