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 0x4ac4d5e9e8d7e0b647f3138e4e88f6cc9786aff2d54014889469b910dd18475d. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/13de420f-0df8-40f9-bf90-56f1cf0145fc.json and https://artists.proofprofile.net/proofs/artist/13de420f-0df8-40f9-bf90-56f1cf0145fc.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 0xe497469f52dd3e1c7255c430a885db86595418604ff0d80756eaec5a63cde684. 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/TCAFH2078383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c77f1e2894ef58d644a531571ffe9df4aabcd72ad5359794f35bc40fe23f95. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCAFH2078418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dd4d8d3932cb6ee2498be537fd24f0f02166ba63a105bb75731ee901e5eea7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCAER2043238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11076b52376606d5ecdaa2c5bd0be5ede93190167fd70ea318e70bcb028a990. 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/TCAER2043249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde67c130183e53e028947a381cba8f42ade611c22d90008db3fa7fd2c652e506. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAER2043268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a00d7f6b5c7d5ee4199c8ceb126809486d5cc7c3b0c8c1fa6bc086b9ad45e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZC62583020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2801b2b844628e91b929dc8a027b8553a4a01cd1ebb4376b2da374f29111a52e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US3DF2533504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2247145fac697b02f6f9d0556e57ccb3d911adf9cffadc64580e788720889e4. 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/US3DF2533505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad95c695210d264d9817ae2736ab30e29bb9b8ddc0e65143a011200c9ee787a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/US3DF2533506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aa24c531a9e8be0cc11a7be86e846eaaf385caba4730f254da8e2266937794. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2533507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bef6a920f3d0611c05af6880e13a4941bb471ad626187e155dbb9b520d1efb3. 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/US3DF2533508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e875915992871c3866b18152ce757a6a78b857334ce0e7a2a6271b9e561977. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2533509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95548ce06ae722ee7a35febe7736fa6638ae380e39459a17af229a64cf34c56a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US3DF2533510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72f27fad976af594d92d257a2150e81d5974117e8b620f72ca8bb9a2fed192b. 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/US3DF2533511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc156b77e196fa65abc04d7bb58fde384fc9c29ae007ef9ba2a0f26b23b8a52df. 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/US3DF2533512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e2057ed177943d3cc012504c1d6a117cd1a228cf4e2438dd2a6ecac250205e. 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/US3DF2533513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523384608bb5b4cf5d2b77e20eb1f987c334a3d7c4526abf2c21aea2d95b5c43. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2533515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556073f4905cc34132cab04349047cae1b51cbba8c0af6b06bf19c4b3060d8a6. 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/DEZC62583594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64c8751ed1322e3bd4b78b97129aed549fa2bacbe8868917141fd46210ab50a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USANG2214318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccecbb1504c29bad8c43c9a607a701ce082cb23bc8fb4afac8970a3d3e6246a4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USANG2214319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b738b4487c09178ee8cbd656d884184cad20725e27a5155d188143cca25112. 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/TCAFC2071301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca8396d27e86af7372791cf984aadea44b1dc88a32f8ca7e79dbc81a95394c0. 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/TCAFC2071307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8c7c4d81da928a5200a4934f07ed6dfdcb19f618a0ceb58a35fa35fc29963f. 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/TCAFC2071316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd483abea1c617e41f5ec6e21185a9fd51cf25fedaab756eaea3f199f2f5c6c. Chain 2 (Bitcoin): anchored in block 957287 (2026-07-09T09:48:29Z), 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/US3DF2532446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c660a519fb1cd7669a236fc4c55f8e088ae48541229118b72b81011c4b4c7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US3DF2532443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf968b2470bd5ce423c64fc4511f0a54ecc83c8007fea051afcad02d7bb5c8a28. 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/US3DF2532441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36304b68036091ee085692462f0659a60836fc85b5438e27ad8617beb9cb38e5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/US3DF2532442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8810c4298643b6887064908038fcf2525f251da17f3daf7c8e2c254f0a131e3d. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/US3DF2532438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea344290f60381f145648d9f25c44a866d42af3a684f2ef377453a217b6672b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US3DF2532440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838a00d7f6b5c7d5ee4199c8ceb126809486d5cc7c3b0c8c1fa6bc086b9ad45e. 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/DEZC62583020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeab24c7aec2c7ae1b948ac7ac6ee99c602a9c134461b5299a6b3cb9239b1e7c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2532437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58075c2d1516e120a7b2ed1853da128f4f2bdcfbdaa48d9dc56ece22ce78f14. 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/US3DF2532435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b036a5b59de37c041fea4009c396a76c23a877415a5ec272ae229ff4431c43a. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USANG2214313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb6ee5c58309b090ba632ac672073e36eaf17297a1bfa60174df5680bdd26d3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USANG2214307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2e828809ca1512c926e1af39d2e0891821f86671f60050d6b90ce201ab52a3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USANG2214312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50ce8b7c868258b48c75905a5a786fb70c516ddb4224227ec83cb8375b7c640. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USANG2214306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223144d26e7cbb8e78fb48a5dc51a727f0c5f0ffe067bc7407e819ee0e7e4e4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US3DF2273513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc426fed34f197144c8342d88fb2ec4ce1b3f718313ce69e0b4973e37da980dd2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/US3DF2273511.