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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa055ee7a72eef9406ac388337e170908ecc4960f1cf4075458586aa68b19a3ff. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7d79fd7-2a53-4c76-8285-f21c841440aa.json and https://artists.proofprofile.net/proofs/artist/d7d79fd7-2a53-4c76-8285-f21c841440aa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b916b6d4a4ce52949014f3db864f031993866226ecf14c0b87eadd01fe00dd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:35Z), 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/CLFV21500237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88a9a47400929853b4b89b1ce8e57fb074fd1e6612ffe142dbeaaf4ce09457c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CLFV21500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f985377fd8397fea5ff70d375332ae84e11f6e016edb113d5cce99d3583afd. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:38:29Z), 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/CLFV21500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6744add24c6b4fc446ff03e6d2b7200c5aa57402fcb3d9ee08e6ed695a79fa61. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:04Z), 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/CLFV21500238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8244c9fb7356cda7343bf5840c17c1e5a3a706eec02a2ac9a7c575b3c0662cd. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:53:41Z), 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/QZES52420476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b8417133139c6710e1db0c690ef552f1ec7407d2ce518abf818ed3d7a6720d. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZFYX2487259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cb9b6ff148fb39da3442347ef4daaf194a42730c792e81766032f5c1d50c53. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CLFV21500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e75033568643f3f3b0d5097a8d4f3e9a43119141f59fa7944b403ec56067a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/CLFV21500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d0d60c902da8bb8e49b0e5d11d48f76599c5e4c5ae4f2a1b1002bf1a80f3b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6G2461866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c3b0d55861c83bd960e7598db6753603c193956876fe97301db9d30d5b9d25. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:18:59Z), 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/QZTB92435836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822c1359d4922b8482048f5e4be72c591c8cd198af54337102fca2a994e875ae. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:57:30Z), 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/QZHN72417134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c59090914852b89afd889fa90838acd72589849da59df7c94d3b31526b48dd7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN52491161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb143aa239da028f168163758b7c8e7824152b777a2db932048bda3c60b2899. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA62499794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad94e08341eff6fd9ec1314e57c6d3d70142c2333af2a986081644a8728f344e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZFZ42460403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6341a65089ba862b6b668d84831a9acfbed33f18995fee58e67b2c7640096345. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CLFV21500239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7584fc20dde404231435aad5a41255dae5ba7ac774eba12f044b105f89749a. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:33:09Z), 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/QZK6L2407155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95523c44bbfe19309200f10663a2d60ad21c8336c9b89ee6c0a9144b9aa555fb. 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/CLFV21500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52add89f5ffadef020f6f70b43e9ea1b51bc8d977f679ed2f13fcc9ac8d118f8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:29:50Z), 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/QZFZ72455865.