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 0xf4c6f787f9a8aec2b4c05637307b826786b11ea5d9beb654ab323eed68f935b7. 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/9926c11b-fd15-4a30-9748-f69dd5c52d49.json and https://artists.proofprofile.net/proofs/artist/9926c11b-fd15-4a30-9748-f69dd5c52d49.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 0x3e2de2d5ab4d818f16178356ea259e759f440e549aec6cb749c73384433f220c. 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/INS180803656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf461fc03d05d2e093807f82160d21c157d68aa6dfa6fbc05998f63e4a79e2822. 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/INS180803657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9347f607ae70539218666acf3cee066d96db05c68ba1ba05456d5139a55074. 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/INS180803658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2883ab76fc7da5b098512760fa7dcc2d6586c396f85e0e3ae79dfba56941c323. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS180803659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a82cf915c9459d94ea2101cab60f25a8867cf806c2c3c62748741194e594f25. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS180803660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39385208f35a592723bc165d0aaaf2bba3c37dde02d78517fbf0b8e9f04a3d8f. 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/INS180803661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dc8f0cbb971f821e152a0c3c36e2ba615ebf84f49dadf88dbee8736f978869. 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/INS180803662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7848b01e39ba280171d380499fccb0ede49c69cd3ed50a6e38d06c0abf492177. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/INS180803664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb4b4e21f0f4200d40a90f5a08805c52e602760a030f18ee89f264cb49e6773. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/INS180803665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403ff9ef0c264110ca27564ff33291af815e75a08bcf67e3fb272b5cb251cf23. 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/INS180803663.
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 0x7e21e6a5ab6ff71a92d7cb6ed8c0fcca8b9794cc0ed54ad2d77d850eea3ee794. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/INT281702496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe546fa0c980239fb616a3e5b1eb3f70fd3f91f28d7d4008888cde2af457ecc98. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/INT281702502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d3cd352578d2d8d563a2d481c7f93259b45bf80a5e2818fe0e14e150558656. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:45Z), 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/INT281702865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8fe0a180f8565977ec43939d344bcc2d7f8140c530d51b82c9cc2d052d51b6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/INT281702868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fa4ffddcffdb4fa95393f8402762ea4880b050c649e2fdf0bfdeb26570144e. 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/INT281702869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5649781dc8d35037015a1001f38bcda16c4627cb6b9f302c3cb5206675eefa. 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/INT281702870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a38e754d8a11386fdb40bdcd1a03eb5a3fa857413742c5e3e8b6decf9f7da8e. 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/INT281702871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5318e41b49e92933473c060eb2192192a8f17e6db091977b7b1b34fd5c69908. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INT281702872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125919cd816f31df5f3f06ac0b1ce58c5f083cf7502f195253b21833c975f30a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/INP532000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6274341f532639c55e5182b616b2acfd078e60fb70fc341ec333e5d03a1ea9c. 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/INA331000910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23981986b98bfc03edd0fe12598f6dcb10227323cd98de6abab64c3b8f49ae3. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/INA331000913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b0dcad6c134aeff9c26fc36a87f2dc6a9fe9ecc349ec1d48a25089bec0b8a9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/INA331000915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a63e15e604aa29bfc86660c644d69f5f6df4378e378097fce0dabbcf0e51c5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/INT281702278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba70bb866b2638207d67955b888b72d3eee9c6aa7d5f87b8b8dc80394e1da89. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/INH512030002.