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 0x69dd171921bad0c2351a174ef45fae1e66885f30acb4379db94201e2bf1556bc. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b1e25f6-c037-4ebf-8a55-ed618795def1.json and https://artists.proofprofile.net/proofs/artist/7b1e25f6-c037-4ebf-8a55-ed618795def1.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 0x22c6dda824d675e71b4989dd1e728797139e407bb0151d1210888212d8db86bc. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:22Z), 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/US3DF1919160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cc93d8cabadfdc9a9254b240603d5b70b874e37684d1d871a3b83e003cd029. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:46Z), 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/US3DF1919162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d232cf460e7839426e7ad65a721a80e28f77e86649c314f9f5f4ca6ab2f9f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF1919098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0caa935209ca6143e91bad63ab91063082840654432382e75e6bfa34302d6ca. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:18Z), 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/US3DF1919105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7530a23a2df8e42dd70c945422c2fa5d05d11eb498e7802aa4c2ad5db3c16285. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF1919145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ca0afa8d1647e46ca48ef02e8f1af796cc81716a6d0c67db8ec1e4919e6084. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:29:19Z), 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/US3DF1919146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c478d93dd2799690da9c366b42612cd7ef48b48314cd80ca9d7fa4366028d85. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF1919147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dc23c1e57983670c04cb756003e3c43a8c5455afb0ae618a696260e420bcbd. 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/US3DF1919115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de0af7ed75f0648982abddfcffe63ea2003308b17b13b54cb9b682fd5dde913. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US3DF1919117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974e42c3eb36ac4c5f897d6c3e34c72b3a500b96294f6bc478c92f607f2f58a2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US3DF1919118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbe7cdedac6ee2cf997aa4a9c2d887492f8a21d23ca93a37a7678add2393bc7. 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/US3DF1919119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814f2dda09b79df08b92b2f1b2a2130401fb14849c4b627dfa37fc5bcf7cc10e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/US3DF1919120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1d06282be0ddd1853bce98daed56dfa5e084dd64bc67f38a35516f0017a48d. 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/US3DF1919121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd2595eb376fc1c0c88ab1a486b9c3af83578f23e5e41396eeb4acaa6acc691. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US3DF1919132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d07a1d012ee8eaa769607ff1a060bc95d27c780b5ff45377a490d8ba0c3db12. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF1919134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4158c2d4c115b47952a253306bc340352555be9c38eb475ed8e135753b119fb8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:41Z), 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/US3DF1919137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf21a308fd32ed07f0b3086230173b4658a3b03a3e0a38af85521785799d569. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/US3DF1919138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aef181fe179c81527988be616940b7ee2a2ab55bca52662fd88779d00251937. 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/US3DF1919139.