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 0x17f4fad64aa9c4b5e96ce2bffe22aebda13d5c7b2bdb7de7a3e637d408a7d524. 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/5bfb952a-0a00-426c-8d38-ff4575f74b31.json and https://artists.proofprofile.net/proofs/artist/5bfb952a-0a00-426c-8d38-ff4575f74b31.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 0x13f955f8b2a6e733b103c02a8c31d7a7d3b8b1b0b0607ee02d4a57c21bc29383. 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/GBEWA2208070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6884a05c93042402e74faecc6cb0058a4386cc428d01853ce9b7e7cd9e88c2d5. 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/NL3JA2200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cb34cf5bb263613717bab6e78e25269398380d067308f9f8343483ee0da811. 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/DEBY72000611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc64a009f0569ee236ac06c2cbbaeb548ca57fda7af776738cce40881425a1a8. 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/FRX201961222.
Don't Forget to Hold Me While You Hurt Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76b8f4bf035163617689d7b2b2bec74a793e2c0c0089d6d126a39544ae35933. 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/QZAKB2374559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e92ee104ca32eb83325861b63917ff1ce780a860536ecac6b8e60ac965aebb. 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/UK42F2400126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3336457daf0df324adb928b2c75640a24e215ebaea97aa3a0897f2d7905dd229. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBEWA2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cc0a4f75cf4340b9c79d3e13b8ec03f3256811adf55e1c30c226b31b5737ad. 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/QZAKB2373138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca7be26f484544a4a9df7362d092c6dffa77a8ddc58ee58e0e8375aa7aa0d6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:09:16Z), 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/UKXN22311597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69af71d5e6b73ef64b1c12ed84faa319485c3a2f690281dbf2076b858a529b85. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FXQ892300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61baed941546d909d99b7137efb8e42ada4016bbd10101bdabca830651675b36. 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/GBEWA2206363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238b3be69bb30b050958dac04f3048c759a35b371ee6c56753be70b7b9bcdedf. 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/FXQ892200281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f14dacf0ecf34831ecc64f017561bc1b2f38314bcf31c12f384cbc8909c723b. 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/GBEWA2206368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22521ffecddcd4ac61c6c24883564c22bd03833d67f2e96ef739211d50b14b3a. 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/GBEWA2303061.