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 0x96d4268c7e40249d9ad0dca74b115a99555c3d1a91877a823e01e20b299a2b66. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/59679e4e-5835-43aa-8ccd-c1d4b268debe.json and https://artists.proofprofile.net/proofs/artist/59679e4e-5835-43aa-8ccd-c1d4b268debe.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 0x28c3ba55ce11eb7d556acb08b97b09e80afc95ee717ab7d2b6617dd67aa2f095. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWS651311010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec3770c4c55a4ae268bcbded16ce46186f0245e5f143cc658da36208e178670. 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/TWS651311011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d38900a95904de953a41594774a2093145b75760d6d53b68a8817febfdd500. 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/TWS651311012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8642941d7b4c49fc3a35c061e3ae5ccf2015549bcebfe81025950197495182c9. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWS651311008.
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 0x29d4fa18d21f5d9b8b210a97fefb03e13a91d4ebdcba5939b0c2d13e67afc434. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TWS651311009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c6d63af4bfad815f994eb661ce90239ed5ff2a21ef80e1c25ed46099a7cd1a. 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/TWS651311005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c22e5a94fd0b5cb2f523d5ad7bb66a4a9d0e3fd5f2e7e5f62f195983f0dfa83. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/TWS651311003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5827cdd39e5b69e615a761d89714f972d4f2d49df6dcf24ea0a92ffaa8c4af9c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TWS651311001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b94c1456ed3d89d7fa59c762013a93c835055a92cc0359050209b0ac8e46b7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWS651311002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc81ce14bfc39bb5b79cda58420357e80f9132d0bcbb15a6b2c3e7dd2b562c7. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/TWS651311004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2440e6a911ba916b0387f40fa12bddb48d1fb18df9b416417f8b387dce73f4c7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TWS651311006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aec0a7897e393420a1e6b5914d3cb9849beef37976978a314fad247930f2695. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TWS651311007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb39544559fb15a8bc9027029639dacf7dcd00e0d606adc7443a39a16b32180e. 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/TWAE31902425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437af528d1320a73befeebe5b7ba36aca931ab390aaa28f4fdcce1caa171349a. 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/TWAE31902426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703927d00c31cf9fdc0f30a6cc8ef4773f9ea17e4061032466c062712553f258. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAE31902427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b9695a0adba712f284a97a6b252cad3708fb873b15f9345d90d4f75a28b761. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWAE31902428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff172aa44391a2190acc367288b2bcb458815de0819d18bdd1ae4100b47f3c6d. 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/TWAE31802544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a907e4a53b16aa8a1777a74e4fc7d40f62504b8b5c6173b49e3bb36d26039. 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/TWAE31802545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2e695296f4b9428af46331d48f2b64b875e53f7bd0b6065373606c3fc9f379. 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/TWAE31802546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e28e093140c2f4174ddf65144a37dcfab0e1e302f383c36d710a5be5ca39011. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:50Z), 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/TWAE31601054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf577e19d09229e0f7aa6d36bd072a30803905edbace3668e118c8403dcac9d6. 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/TWAE31601055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61db4059e5ed76ac5582f1b131bcf8d8d7c759259e1ac075b54aeabcfcac066f. 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/TWAE31601053.