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 0x73e192a540788ab9c6c4789d994a2b5c034c81fca1a69dfb5e833ace359e682b. 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/0771138a-932c-4926-8538-1ae9f96b5b5f.json and https://artists.proofprofile.net/proofs/artist/0771138a-932c-4926-8538-1ae9f96b5b5f.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 0xb11bdefd31f96afdf890b5db8e9c2e41a1a5dbe7eb7b9f04f5f31e5503244982. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZNFJ2300728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f70038cec320a98620d6c573e54ba96d7d79c7acb8b17b6c04f79326b44779. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZNFJ2302077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4ce6325edae332ec598c7cd34b10ec5d5af6bf8010bae1ab8cf227355cd016. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GXBAV2229845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1653200061edec98afc168ca3a7d5be42c06bbe918a677c69eb7c3170afece5. 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/GXBAV2229846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735e097e3be2100a125a75d86cc96d7fdb0a8723d7df015c9b9e769720eeb585. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXBAV2203280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c56e84beef7c35c429f2869866a2fcf3aa54e1ddca8a300749b60c558116558. 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/GXD7V2464468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bafe03fb7f79ba785a12dd56684c44594ff49fda76d31245994b088bb372bd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/GXD7V2427617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f80f01d621fe7b7d7d050767beba40f3e5ad6437c00aba7e658c062f204cacd. 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/GXD7V2421544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684236d7691e00b03fad93c928409f6415e7709e0ef7b59734edb0ce57e5bd6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXD7V2485665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd4107b03a9e2a479f8ae259d3894d39ec62c7fa280eb60a8d947c28e130388. 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/GXD7V2444824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e3fe5bb11b7c381dfdc6a5935842ec828173eb06e0e1b47817c5db783f9153. 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/GXD7V2480291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f184d9fbe280af58f3a7f780b863665ee345412f631a38c73eb34b079fae99. 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/GXD7V2488682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa479f67f5a0aead74e432f85cd730fcfdf6efcd6dd8541379e119263f81e8000. 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/GXD7V2267682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05264c5e9d4355e04e0ea5cb3a8142720e4d95a7ad942c96232e7d516973e88. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/USA2P2460547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6002963cb290dd4a108b2c45ef683b95e735ae914ae25ce23ce993cc0616820. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/USA2P2468744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14204b1bd6beff8d0618eaf8198a06cf131a4675ff7e029ad3e68e00d8a712ee. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USA2P2500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c25f2a1345d3b8c66783480985466a7966158121b9220bef5c91a080d0162f7. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USA2P2500327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97885a6f786b3ce23b544f10f8e74d3906e23b961901b8d10dcb8bf16f6ca801. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USA2P2500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4af2a46bc72e2988594d851e0f32ea3e4f2bc69d670a769f00ef7f14c7b0c2. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USA2P2500331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53007dc5007df91bef8fa755e9bdad9ac09cb51acbfdcdf33bd92961b544ba7d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA2P2513752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dc93eb5dd0dd06befac8a9e72ad2c7079024d0835a18b33bf84500a86a2585. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA2P2536024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854bb7bab4147d28d5b593e82aaad8dc755a6c7b849865b5d550cb39db4d708c. 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/USA2P2536588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16334127d7343320cd8d41d884c5b730b85d51295291b2c051d49f15be8120db. 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/USA2P2536060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cf5f735a7acd43914a453fc83714f47d39da8e8c023a33bf2fa578e5592b15. 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/USA2P2536059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5b5ddc6d2deae6701181e83929a732188f290463ccf475a4c864dcdbfb4935. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USA2P2536037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ef81a0683b7659c2bf91d1f25cdcd8104e548d21288bb22e026bc23d8a812a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USA2P2536036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa3400f008fec7a9ed9714e47f4566f36e4def843201850bfc6dee90eb7c56c. 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/USA2P2536029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3c5c29ec922bb606a8985713e90444fa440067e590fcb58fe129c3daaf16f8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P2536027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1fa32d41d4b9c336d5aee1ab5027618c5131bf9552d4c50e3798b4fc56c986. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USA2P2536002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66991a1512161055675b422242c2f7cb60f49cd3860de90feb64d361f382fc71. 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/USA2P2536021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dc93eb5dd0dd06befac8a9e72ad2c7079024d0835a18b33bf84500a86a2585. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USA2P2536024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f8c18b5a5f1f9e08582e14127e2853bf4cd65c4250b1f01b95394c52040800. 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/QT5M32524105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e121cb553ab9362bc8e42a5f18dc38db36c6c823cc93c291972dc12b9c5dc6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QT5M52503625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033f33a903fb90c9f7c3fd978b38e160320dd6700b0d57b647019fc070bc29ef. 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/USA2P2468745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81fb89dc0c2fcde4f4eadcc5367eeaa3f2c53d405a23780eba650e496b93ea3. 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/DGA0P2464241.