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 0x256a3605cb502316cba083f4525e60145afd03ecf0d86b4c20456f384c5a28e1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4327921-7ecd-4e57-bf38-25351bb4aea4.json and https://artists.proofprofile.net/proofs/artist/d4327921-7ecd-4e57-bf38-25351bb4aea4.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 0x32780e771e519cd0fc3f902e8426d44258089bdb6c4b010cc9829c14f79e87ef. 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/USZZR0913274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4d584d4dfa2b74634d48054ee01de692ea15f1894dbf371333435c3c4050b. 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/USZZR0913276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf9568c6ee595918f1b7717d67a32027050346a4f30202526d923ab103eb09. 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/USZZR0913279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77339fceffe41de6e27325d518759f0b8f860aa14a2b5c8e6e7a450ed3957bd4. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USZZR0913281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e8ce98afcf9d836e439cd6643c94b9a53dcf68b8dae68eca286ed1064f6c71. 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/USZZR0913262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721d08d04278fa4b68f782f0e5d27c22919a66576d52cc7e5f2685cc18478586. 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/USZZR0913263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e5dcc0f65fe9b95e294428c6ebbf60e4986a7a9898ac3c52e3492c40bd7e97. 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/USZZR0913264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f0890dc2bb71eb9e86df0b53b76a74e0ad18c0ae8fd3ed3d9f6f842bdc8a10. 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/USZZR0913265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f237af7a6ea6ee1ce2dd788603d66deb7bd9757d3c3865d8a177e2bdf0e429f. 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/USZZR0913266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1741593e00e22eb6c842a06917ac656eec91e62b170f4fd90eecc5a684a1ea0. 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/USZZR0913267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07c106b1cef382b448e87a0b3b7ad9f574c9d1d4dfd417f77087854cf7a9698. 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/USZZR0913268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9922ace12c2de680044d0e5c0bc1fd31f7ed8480677c2214ea53f7d55320d028. 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/USZZR0913269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223dee8ec2c0910c24b8e85817ce12ae5b2e9db29a2814b65616a0882a241f33. 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/USZZR0913270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd49245c7211f0c0faa4b8695f56f393e91b4da7e61f7cd6c56c5d2f832d42a. 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/USZZR0913271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e967b77cc808f888e0f509a1a2655d6df84aa6a10eea2216b787b4419f3b01. 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/USZZR0913272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f4dfda5b9711907a68cf59718124d0cca9c83fda783382b106777adc6da074. 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/USZZR0913273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e3328a2a65354ffaf973ff1cad1f077298db4b032732c09dd258e909d1a83e. 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/USZZR0911765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9cec79c537e0ff5e76243fb8ba01e157ab6635e79a4bfdc9cb1071341a0849. 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/USZZR0911766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412ed0b5c4f7a1fb919bd4263d7b13b476e89c6272b0952bfb36ed42f62ca4b6. 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/USZZR0911767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3b58fde6804df73d2dfe3b971a16603becbf6fe882fc901430320f15e919b8. 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/USZZR0911768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acb5b203395aa2b528e13bac9c825d77f4287233855be76fd37a2fb10877719. 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/USZZR0911769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf403214efad4ab16e0701429b4d320db2780b39dd4bc47a176b0cad46ce1eeda. 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/USZZR0911771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec809c10ba588b9410fbc42a321d7855612b812b2b9e2e8f31a6286062f1580. 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/USZZR0911772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97be0ea542adf1bcd6ec7ae25d03cc6782ff342d93ee6bbab77a76e33f7f3cd. 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/USZZR0911773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd298376c31cf4bdbd8e47d735cb5b8571c944e1768e37d9151305fe74bb522e9. 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/USZZR0911774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e5d27f546ebc67a3b6aeb4d2823a6d51b7bb4fe84f2b761b81690c2c4143db. 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/USZZR0911841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3621d983752cebe65449ab56bb18220ca884028a70b7ce9ba9e422ad0550e36. 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/USZZR0911843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f9772191a9ab8967023054ff73287613f34925356c2c83c90954b1b5a3e42. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:15Z), 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/USZZR0911845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74018297bcb5ddf987ad24bcb890700cc4789ffd6cea4b8bb76b7e447e1c603f. 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/USZZR0911846.