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 0x93487e10bd73b87152b50903f41f9265496d84ac96bf73e7fccadc5fe7c403dc. 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/119110f1-e3bc-40c6-a816-cf09ef91f87a.json and https://artists.proofprofile.net/proofs/artist/119110f1-e3bc-40c6-a816-cf09ef91f87a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oucha - Nick Warren X Nicolas Rada Remix - Mixed
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 0x22949cfdc46acdee7583265a9d9a0f629d69447e7fbe52a65056539d242c1b7d. 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/US83Z2212974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bec858c24c552183b55219a5902ed750ea5533cc12db5b5a2d9c9dc5bf5586. 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/US83Z2216285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1969f97e307895c96d57e71305db86c097c52a30c320f110fec9d4e0072c8b. 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/US83Z2216286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40b00f914e8c317550f63c1d574bc94e3da80c3d89e6ac6b1487054c3cf9cc7. 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/US83Z2221093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee967e12437e1559b1c3f009258b5a683a66f22de99e1c52482c5cf3f20eed8d. 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/US83Z2218468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99266bcbde82f2a0b819f1e9662e9b3dad9f3a0ba4a06a27ceaa365a6f55c864. 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/US83Z2216269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2244b10fcf5e4141c726b91697fefcfb29cee9b10ad98e512ba94af7510fc7. 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/US83Z2218829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b370b915c912779a7913d71568f1579e3122e9e08b3330f56cce56956b96541. 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/US83Z2222070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59cde313377eafa0f0ffe4f629c9b43a9174896282b66b8f032eb7d8baceb28. 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/US83Z2215088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcafa0c575c7ede27776ca222773c0d32a8b2d4b65fcf073a068c0055d17188c. 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/US83Z2216052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01995197a21a4ca7bdc2b322185ffc5fe48c977d078aba43e599a398a2dfa8bd. 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/GBKQU2446256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9038e7ab6a896ef8006ec7c06c1196ec6ecc8cab2e319b9a53b4e11face86358. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLV62311659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368c71ad4eb6da22879de4b7a1a98b82dab04fc7118ea6bdef478b8c1d80b221. 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/GBKQU2364522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa153a450fc74c0c73732656d478785d1b76f7847b1b55140554bf0639ef4ebff. 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/GBKQU2294790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd211f5100c0d3ecb6c3ae0528dcf158ac5645b28aff4db9b2353e145e0256bec. 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/GBKQU2284097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3672ad4fe1612fb1d763fc738918c15785bcc5e703ddbc6f430304af543394de. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/UKR6V2421109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9670687c43c893a9f8c21039c698ad0294faf6593582e089ee295d49fdfb6b5f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/UKR6V2421110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637098ff6057ff6d5e37a20a1b4a3a57764b3125e674bb92c430692f3c4eda4d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKR6V2421111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe881447465d6e3682ccd6fa2c26f73344d40a9ca546d652562b54a4b49ec68b9. 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/US83Z2221090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb310fb21f578fd012a35367054c81bce4ecd6e52db3f4e28bcdb523515de9b88. 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/US83Z2221091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1804b7366f0a4ac3fd76b0cdad134a52389821e9abfa5ebd0c7fba8ab28de21d. 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/CA5KR2439990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3852c42997a1b0a1d35ceb5eb8a562f3f1fe90c40c1663cdb3decdc2aba32be. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/CA5KR2439991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5166c2fee1ecf43c94e09e02f85cf4182dac03cc97abda37f5fcc06d34e67f7. 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/CA5KR2439996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6719845563220383052e26b4da50ba29aa70b404465000e5c2dcbeb05f3f040. 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/GBKQU2407933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e926bbf708122ec82f68bc44602723644222077c16b7bd981acc71fbeb992c4. 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/GBKQU2407938.