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 0x1289f1338553ff6bda602f82dfeee168fed14ef966718a18d471d27bf6922641. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe7a185c-c7c7-45ee-9fc1-dd16e82ff922.json and https://artists.proofprofile.net/proofs/artist/fe7a185c-c7c7-45ee-9fc1-dd16e82ff922.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 0x14fdaec7a250ce3cb8ab72374dbfa9e1b653fc8228da65587af4c91befbfc40d. 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/FR9W12429379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117043f6b6567405ecd2b0c8f9215ef619e982f4a37f2107c33f536f3a3f2e5f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W12429380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54e00027398c54cb86ce3ce3fbe6ea87359afc24f5a7849da0774a39c621fc1. 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/FR9W12429381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbfa5f138155de384d57fb4db2b96f6f00e5c89e4758ef882b908a0424a576d. 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/FR9W12429382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb08b4784e11ad5e48123bf6022a827f63984f6afb3603fa677758a21949bb6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FR9W12429383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e8be2d1d884c786229bd3be9d16c575a22119cbf9ac6fc79328a8fe3ac0640. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12429384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84376d1e4239de53a070f59e1e8ca4f7964691b25bdcac1a5ca039c9f2a8572a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR9W12429385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e76d7ea2f3ee056daa92e8565eb4ef6b1d11d7cc945e8cc18965f2c7c9ef02. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR9W12429386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93f6ec51514c4245ae8e3223321ce6eda4a0817ad6ede544aea77175b7c078a. 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/FR9W12429387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22220ca0e7291f2ffb3d37eaf1aafaaf518173380cb82f8ad638b4f66a5b8e39. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12429388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5259e711f7f476e2d54c39729de6834a40db22d875ca462df9db36056e8bc0. 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/FR9W12201853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba674c665bfe688c5caf00fed108818715356c946210038b71f39e8856b7340. 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/FR9W12201854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5777b0bea700998330ad66107070c363a4bb9975bd17acb82031fdb5ad8df26e. 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/FR9W12201855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a434919f12ef35cb49595c27e3c84ffea792c5af5f4906b3d216ed2c1820b1. 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/FR9W12201856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4c088a09799bfdd70529786906ecaf2af20791b829681a59d62b0876e7a4ec. 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/FR9W12201857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ede82652eaf672b27ffce413375e91ca3f85749ed81944060f766e380db1b25. 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/FR9W12201858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84250806d96f27c53db6bd6e5842f4189b788c104b67494db814dae5d3f9085. 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/FR9W12201859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa541d7d07f3896b2b7f1fb6f371d116d34093034da3f806ea94388d896b34cf6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9W12201860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36879c1714ccec381019899cc2ca1b36f6ee09441ad8b6cc965872db34be476. 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/FR9W12201861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46db9efece0290e7336fc295d0a7598f686ccb0aec97685aa7369534e34cd98. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9W12201862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fdaec7a250ce3cb8ab72374dbfa9e1b653fc8228da65587af4c91befbfc40d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR9W12429379.