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 0xcbde471c53a5b5590482c147e006c5daaf0ac6b2ddec7691fdd148d82d81f6ec. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79855af6-748a-4736-a954-bd500c69ebee.json and https://artists.proofprofile.net/proofs/artist/79855af6-748a-4736-a954-bd500c69ebee.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 0x6e4347b8c559116be145d1ec775a1acdf63933ac39c31539adc543c5a78efa91. 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/GBKQU2446313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708c58abaa814fe63226ad1938fb9cde53007f03a1cdb9fc6d2d2bff2b550c2f. 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/ITA061302405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb73f605b8e61303c726b2b6dffb64e6d5d9df8313f7230471777d3c610080c. 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/ITA061302407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aae4f6474f1f6ec79275d3659aee4db3a9f4a787626de2438b25fac8b5b6381. 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/ES94G2221805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6167587f1190b90f50a9bb39961ac8c5ef7d4b207c2a7856c73758d1c339a18. 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/ES94G2221807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fd42d9fbc14cd596f63b5c4b1a5f1496b2e1c54c4417d1e0454bc516dcbccf. 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/GXC7T2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6598874bd8b5bea088a888217b6ded34ed0bd224f804ec8ecdcd2d6bd35ebc65. 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/GXC7T2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a091a9a28c10b30f05b709660d5926576978b1aa9da0d655e54646ca3db6b72. 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/QMFME2471506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb767f1be715f32dec139a98045a026507a3be7a4d6dde354a8172b1a86f017. 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/QMFME2471508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e536feb496bad2164f49102c640272bde56bf4e332c22c8c4ec0d214080a4. 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/ES94G2430102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc0a4f9896401ffa52cc2029b2426a23eeb7a51f19456dc96ffdbfe6a4f6f33. 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/GBKQU2449319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bed20a0f7d9a7285ffe4050e4b962a7e4e88d6ff1ec576f8040b1fa59b472ba. 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/GBKQU2449321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fcb9a77306f8b51c941cf77fce1cc629962c9374b2187ebcd2c4c8837b8aa7. 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/ES94G2120006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21960f02d9049537d869a0faca2ea968ba6bd0982a681dde41584cdb90962832. 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/ES94G2120105.
Voltaire Music Pres. 4 for the Floor, Vol. 27