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 0xd01d0a460125bcb14115cdec0a80a1b677dc55bb0f51ab5715c7841e041d62e4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3a48889-d010-4381-b497-2e3ebf24c4af.json and https://artists.proofprofile.net/proofs/artist/c3a48889-d010-4381-b497-2e3ebf24c4af.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 0xf4b5c9621be28e5e2408a0fcecee5ec7f43149c95df8f7d6c7acd5c7fe5b5971. 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/USVIC1875301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185387329cce8d832ec9100784daf62926a26baa91a95f451840228c1d569a7. 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/USVIC1875302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1145e5a0a06338d247980ecece1da320790abb8ceee6d5ba6b02c5aa7b711ee8. 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/USVIC1875303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18899c8f279ecf0d051273afe9f5e68cf21d1f1819206ab2aa5e339b2228d57. 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/USVIC1875304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b356de984fe88fc2eb5b537e20e353659b85d07f1c3d89b9c4d85ada27c097. 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/USVIC1875305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a596009f2536e7c73d9acb1be6b413130b2e9b010994014cd10ec4f9ab99dd. 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/USVIC1875306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fcafe06e21f92fdd8e725f6ed2af82e9c803e8e1749716f4eaca5243373a73. 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/USVIC1875307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44103aad223578cced09b94f3db41ac01514c011fa004aa80563af54a3cf071c. 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/USVIC1875308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e7cc10c7d2d4f4f5e4255fd41e476ca44cf17796923701f42191445dfef434. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USVIC1875309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d52bc4c277b29fe4f1d39a98d9e442491da6084ef33893c3a2d477c837e88c. 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/USVIC1875310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4c2827f3dc2a436d3d9c78d285521977977afaf57f080b80c826724ab25dd2. 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/USVIC1875311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6462ae5ce1b198911541225cb5a4f8d9ff6269d65cf88c2d27d30fecea2e3d. 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/USVIC1673201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe803545ac7e6035af04d88e3078f79c02f70ccca9675ee512bc12ee70e5790c9. 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/USVIC1673202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccf913473349f7da7eaf0f8fa279bac983ffd6b38bb855803336ef5f57d3255. 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/USVIC1673203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd021f13f3ff96cca8ed103bcb9353629575b2dab2b2cd3509420aa1b0c461253. 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/USVIC1673204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51d34c566e62d0568005dd287aeaad810166f6610929c2d70756da7df3d5853. 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/USVIC1673205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b08c72642048e33bff4ef25261cf8a6de73ee86740bf7a93fb9043e3796da0. 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/USVIC1673206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e93767a54debead9d27c6b8b6a3134a595315c80ed2d4970d62bc9d3e89964. 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/USVIC1673207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4670de4785a66e1ca6d5a75e21421d5f8f60e46ce5953d8e7a1d14a7c18b42c9. 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/USVIC1673208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e228121807485efc9befd0777556df67abbdf9036a612d3987cce2b29a428c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USVIC1673209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb399deba65292d46d2346083bcf064c27c795f27654bc40ccc1c55c8918be820. 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/USVIC1673210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c57205a5be2444d3580bff4f41fa0561c818e04e4b90e052f908e89d1649605. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USVIC1673211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ccb2dbe9a304f7bff5e615c7f63fc967cd6f5d6ff5d33202472c2446be5452. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USVIC1673212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1e93ae6ac5746b0287f571e0f9ec8e62ba17c21a89b15a1f24e3a46546c3c1. 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/SEYOK1403378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf429d1fd8fa956ce9cec1160a832a75e37e408a8337ecc1fddc8b8782992853. 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/SEYOK1403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd684f2d5678d7e44a9dbe42041ee05871a8f2ce7ffaeae64ad64bd78f2119c. 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/SEYOK1403380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf7efc872ad30bdbda1ab10532ad0ad02d925190700faf96a14b2552964f915. 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/SEYOK1403381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9eef703c9b25bbd1d98210851c58846a92f4900885dabcaab84381293d1e4d. 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/SEYOK1403382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816d272d75925ed704e44bacfe0b978dcfb88fec20e42ef2fbc91011a4858545. 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/SEYOK1403383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c20ca70847e6dbea84ee6544568dce68828fb21452845239608287c35ea04f. 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/SEYOK1403384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a4fea3599454ecd25414d95d710bf59db3966700254060ff5405292854e6c. 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/USVIC1775601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad32a5197ff74d91bf390ea4113cc90c215ce0dd9965655ba16c6e39a021b7f. 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/SEYOK1315041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26939ea723aed941caa0af7ae2eed3325163d43b9c1238ca82a8b9d2c73bac83. 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/SEYOK1315040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5e95bee23707e21b1e2f09e0920f811a37fd64e4ea9da08f555551799f98c0. 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/SEYOK1305866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c8cae3e3738209d8c32df66c5548110b667049e2c7399185acd7fafca634a. 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/SEYOK1305867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eb5c5cd57a6aa9e9b838722d5cdd374b91737eb6e8e518920049ae09bb1716. 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/SEYOK1305868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659fe8b1166e0b9dffc1fe489f4b2782e0940a147088a7fee67986e0c2f401e9. 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/SEYOK1305869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155f939b97ac81cd1a9f3f439ed3c1b8506fb040ff10ddaa1dbbe1fc1a7de63d. 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/SEYOK1305132.