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 0xc95353824ce00bb32f77a2cc76b20e20ca267fb0516e3aa695f5707cd20dcc19. 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/879491ed-8779-4652-9610-7a4b67d59547.json and https://artists.proofprofile.net/proofs/artist/879491ed-8779-4652-9610-7a4b67d59547.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 0x45f06ed824d80a8c1733b44e09a3dc8739620aff9d5d02e151b6168fe9dce1e8. 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/SE6I32495043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b3eb3e3b8ca13f66e670b6f8862ea8f411886234aeacda824859d359739f9. 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/SE5XG2405633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4204e2e1b413a05f32e1971a479aaf258324ce3135341b24df70d43ba876a2e. 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/SE5XG2405632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1f065f7643b621857a09575b8b7f0cdb356829b68ca6fa53befb5bff4e3bba. 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/SE5XG2405617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3d2b17ad2270b6eee9e3ba2e7907c962a81896bb0d2b09b5f656ccd375be7f. 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/SE5XG2405643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302bfddb241b1322e9a78c2da0327eaea52538524b720b7674fc2d7db972c666. 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/SE5XG2426447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3110b250cd8036745e10360a58a5086673858d7a312befce28ebd18f2dfc25. 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/SE5XG2426247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150b431de75f3818b822cf906eb695eca2083c6e8bfaf651cae33be252530dfb. 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/SE5XG2425147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd509687fc84ca9abedec3db28073d442602ade1d872755c44e197417432209e4. 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/SE5XG2424315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3275d8c4b4242a76c0ea01463342ab39abb3491c899ac72f3ff8595b5f61d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5XG2424300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5fb978ea1bc50e2d7590633c0d163593c4db35ca5cd1307d6e7c03f78a0592. 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/SE5XG2422908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f2e96a6a04c299cdfc01e7dc9d282d70dbaf2471efa10b1f7689c2c3f9c0f6. 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/SE5XG2405688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e1c82f8a2248d604cff80fb7c5130dd8db1306d286b5f592c18e32f5824737. 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/SE5XG2405679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca7caa94828ab6330e795b7ec88e92c744afdbca4aa98b10f61026b6871bb06. 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/SE5XG2405671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60782a079600f4d13fe17c27eceb6959b94340d1daa2f9590c6a8d642e3cf96. 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/SE5XG2405669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c344176a886b667a551ff62792c55014a1daea16abda1391614cc414b24ccfd. 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/SE5XG2405665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63231e5663b626af7fb88aaf7083104e641cb4621044017f6850bc2fd14beb0. 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/SE5XG2405655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c5d5661f9679e5e2ed224ebcb9a9e29ba9ecb7edff6922d134dcb7822e52e0. 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/SE5XG2405637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512eef74196d54578e1e4472c910f92ce305e8fbf90b72c8ca8149aa9caaae15. 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/SE5XG2405627.