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 0x58e649849b27473c7d27f6720ff9d1df3abd99d0cac5eb2c4193c9472d0e24fc. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00603277-a732-4cd4-90d4-69440187719a.json and https://artists.proofprofile.net/proofs/artist/00603277-a732-4cd4-90d4-69440187719a.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 0x7cceeacea8d035eec1d21f7d6243b7f16b0273b71143440fb928bad75ce5f1b7. 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/ESA012558596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe25c8eb22894e3029b5604b707b9171e3c718f72206980e00b392509838954a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ESA012558597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c007297e312b8b63a4338cc6e62e600e85824fb98883042f8533c86a1aa4a03. 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/ESA012558598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9c0bd55022955a9ccaa361bdea2ff95fb272c92a2c19985c15c583458d2d83. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ESA012558599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0165843670ceca5e1632c4da99cb246e2ebeac9b630f875ed173645a32076707. 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/ESA012558600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a3f9dfc3d2956b60c1e7510c7fcec6a3352f8bf291b2d46d89d5cfe89983e0. 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/ESA012558601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0079a5fac312d61c7ba0406287846bdd6ce082827fe1d4e633f8e0c769e3ca. 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/ESA012558602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430db7b9794419454f5611a790be1ab6e55a59892cf579497247cef0a8405028. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ESA012558603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac431218a6cb0b0b198e8ed01f5f6f0596f207041f69e8866342ff699c42f35e. 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/ESA012558604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7b87d0577b2388bc1a40f2b1c8f5d96d852dbf454c91cf97b3613cab26d662. 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/ESA012558605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55b45b1efb1a08d3d3942aa1385a565ad8ab3d9ffa63d40c67cf87350c86905. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ESA012558608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39f59ed2c68f0b48898b43402bd1de77a1fbcd9ba381db0c1fd3287c2626d25. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/ESA012558609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef4f3c721c0eb3e7377e639bb588f4033406ed348045eb272c838af923178e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ESA012558610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614a78b3ddc116b32fc76c9340e052696a7e919a33926dd111287554f41c089d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ESA012558611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b2c5a8a161d24f235f772e29c37403973558eb47622bf4687474ea7023b086. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/ESA012558612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5858186346ead0278e72546fad3e86ed24efde2b03fb0e12ff2db81ace5d477c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ESA012558613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8deaf86bc6d90d58ffc32c4358a9f352ac9c23f2f8a925848a972f69df38922. 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/ESA012558614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56fd2e7ccb40995a2d2ba886cbe7d2a478dd7db1e58838318d516433a892b01. 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/ESA012558615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2aaa41c9c0c4985998cf12eaa8b017e89c97e4be2b74b19cdb442906428970. 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/ESA012558616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b5b30fd327f61a5663a06968167c7f7828b9683dba9978e4983c4237057778. 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/ESA012558617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52aae594c7330e7438bb4a29ae4d9a35d17bba524cc02432a81adac78def567. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/ESA012558618.