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 0xf02c20a2effbcef6170b3ee9fdb60f789d91b4de2d2e6a6c22413c2984d0cca2. 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/4f7af0c3-794b-447f-bffb-1945bfd8c216.json and https://artists.proofprofile.net/proofs/artist/4f7af0c3-794b-447f-bffb-1945bfd8c216.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 0xd4868580db3f20262787f9adb0ef87fafe215b4b633c8c99d0f2fe8df7c4fd4d. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA61843128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf500804689666b8be2b88d5dc0711b3b92f1baa341500acf246af8f96c4572a2. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/QMDA61843129.
Live at C.B.G.B.'s in New York (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9d034915caf5ad5ef2e69ff63e0c24b313938bab7717268d16c89ca7103c13. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA560622529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023988364abb36bcf7c6916153c4372b416723abdc55276b11b8a4c6bfc110c5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA560622544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772c97c5d1f8104ad8d258dd9cb3370a4935a6bea06ed192605aecb1980c1bf5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USA370523532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982fe5ff3b6e2128e4a069f9cdd44f4efc33114730263e7a7d8d5279eee7abe1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA370523533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772c97c5d1f8104ad8d258dd9cb3370a4935a6bea06ed192605aecb1980c1bf5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA370523532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982fe5ff3b6e2128e4a069f9cdd44f4efc33114730263e7a7d8d5279eee7abe1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USA370523533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978467243f87738aba8522e72631e35d464a26402655136b7f4b05f00bf0aece. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/US3X59300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70cf6f37bc7cd4b05c64bb9ece372e3df0814103e8b7200e17a2f988a092a05. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3X59300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfb1493e05609a2f3d7a255d161ad06a73161287c42269e6c52f9278e3dd650. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/US3X59300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74dad82da8575c0c3584c73b9ee639ce2f15dd6f0d3c21dbc05141b5eac17e. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/US3X59300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d7cc5e048a61c3651324f84c3d8ae3816b98e46cb875ecf6d355848be7eb70. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US3X59300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666c9b4dd95f851e51c89ca7be35c8d2ac1dda8ea8506ce5ce8792bf85bdeb55. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3X59300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f348b4c3dcfc31fec7156b0e1111d11047b6646e34a30bca651475e48e12e2. 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/US3X59300316.