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 0x1761d2accc2e97c59e50df6f0fcd132cdf4e6ad1675305b38823b3bc83712aec. 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/5f51b585-81b7-4b0f-98dc-0333319761ea.json and https://artists.proofprofile.net/proofs/artist/5f51b585-81b7-4b0f-98dc-0333319761ea.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 0x39c43e9e2b1d206d25ddd8cf345124b8e175a8a3b66f9f2c23d394b1ab135a6f. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZNWS2092147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636cb5956a27ce666b6106dab996c52739b9f42ec4534b5e8c75a524a9efbfe4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNWS2092148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9ba799628f736aea92a0d27aec185ff756fc37d8eb3e8880f42404840e4c98. 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/QZNWS2092153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eae0c12fe28069c22c1165f81023d61f8a65c550bb49b86617b84566279709. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZNWS2089560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bec0c0147c9a66df0624d98e6c6421486a9e3e145afaa6f940460744bfddf23. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWS2089561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa162f1a5ba459fc07405dab0e37491a795e08cb11c86e8e47ea9ad6b2e4b6c03. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZNWS2089562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8632b493ba31545f5eecd3ff9415aa8c6b5bbf4c2a5ea5e9fb231ac502570a6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWS2089563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838fc73a1a133d8bdc6d37605540ba151aabe934398a957d2880f8ac8e086997. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QZNWS2089564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9ab2dcbfbd1f77c11a168f7f4bdadba3bc554783c40e821c7834f979ae1f82. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWS2089565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4462c0885b0d1dbcd5b4a1efa1f0683481cd7e75a132504b34fe4e534ae223. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZNWS2089566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4125ed8e8f186e40907be5bd158d4d1265093015140c96cc05ecc92406d51aa4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWS2089568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13c5c648add873cfe309fd481bb24577f66252837004773430b5f44013379e7. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZNWS2089569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52407daff9f0917ad83acce65ac7e5fc519387414e3440b7c70f7cc510b1d1b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWS2089570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f51b9d11778b40c7c0d40e395ed02b9b6a94bff9c516a2ddad09a54edab9ff. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZDA82126980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99a3d36fac35a4751b0a254b4e2b81b19b5a275226c67432df53a42d212dde2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHN32127248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ded05b00997e58872079937c9f5d39d8a4d39b9a22c32521992073a5b66eaa3. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZHN32127249.
Fin de ce qui est relatif à la nature, au temps, à la conscience et aux perspectives (2h44)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b510529d568d74eeed4722cc317cafb5a6713317ca3bb238346e5d82aa1df66. 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/QZES92120083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe613f5369d0d7ca899a5c2e8171c94c6356360d352e1e2f98cf937b7b818225f. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZFP52099305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0057db61f5aba424ca182ab705d3c9c91595dfde83199fbef1fa42d196968a6d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZHN82096037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05753d1149819c2f7d71b4db822697f081810bc2b08ed51673927bb6a30a356f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6K2081656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41601185110def6b7db91de8f84bd4a9f2f1e59cb5fd707126506cdd8a0e2431. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZNWS2041546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0fefb2cd4c3a15c07e8c5a495fc121683ae6bf1d38c755ef5febac6bc9cadb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZF8N2123648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d04d61cb68bbc4cf9872efe999cb16ead3fcf3b3ff9d40ff37d68993f5df94. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZDA42211873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b945b15fe616af0b0944f6e69d1ed2f713b1539e26f70468b9cf1e274bfc5aa. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FXQ692200112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5369e93626c2bb0251b7f05e67911db4c674eae04d1b59b202b26e5120daf2a2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZFP52278544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17f5da46a825897a19f9841126f6be0890b06adbb8aa833973fc807aad4f4b4. 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/QZHPJ2247710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0f400feec94ba03a2ccde8ae93987516776153fe0ad3061089f9d5d40009c. 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/QZNWY2247594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f42873622ecb243f8bb8649e4a5a558492b729f6f9e1e0c979ec8fe7fcd5f5d. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZPLR2396495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cbdca67f79ca421cb5b103db9a7222fffd265c5257c06de231263427c1fda2. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTB72304720.