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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4039beca85b844f308767bc6e2f3f85fcebfc1e053d322100310e2ab2a20d062. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa70085a-bf9e-45e3-8c4b-1357c2b26744.json and https://artists.proofprofile.net/proofs/artist/fa70085a-bf9e-45e3-8c4b-1357c2b26744.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1170a1e1671074bed559f201b23869c9b530cd04de8afb46ff953109dfbdc03. 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/IT4SR2400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd970e9ed657218fe8be07ddb1b268ab6f18c2113087584fd9be94981d93c86. 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/IT4SR2400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc777ed9b33d94ca425f1f3dc0809d7dec63ca4b4d568fde861b5bcf3ead57a9. 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/IT4SR2400097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a469f6d57dbf96fbf7186a3870a9c1204c95f4fdac2bd0bf3a644317ab28ed. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/IT4SR2300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4c664dc5f8f8d11a51933115bf059536330c2ebeda5ebcafcbe2bd5fa2a2c5. 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/IT4SR2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e140681f52a2e31bf8c94067f7b7eaab751167860f63e8e325d9f3387d9ead9. 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/IT4SR2300060.
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 0xcb199263edfa0e276fafac781bdc329c3a85a3534231a96cbe844218e0e11c11. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/IT4SR2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2a3d8753ab99898843cc981e5e66128e5c2dea48e21f3c8df511aa70f87bbd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/IT4SR2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048291d4fea8fb25438a7bb5906fa9c1fa8a6c47c81eb94b8b7dd63fe4d9574f. 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/IT4SR1600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93905647777abf20fdc4ae5f84110d3292044e07f2f48e806685f482499d7b4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/IT4SR1600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88db8744532f816163701eabf727a330295d29cbd4d2df07dfe098c0b30928ee. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/IT4SR1600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc26973a28210ce6ec58bbd3503271b3fa0046d738c9cb76c569bbe9f63533ba. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IT4SR1500025.
Ain't Nobody Like You - Soulpersona Raregroove Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2971fb0febab9009de374237d92deeb6670c6d0b514a66f4dd4a4dd4c2b52b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IT4SR1400005.
Ain't Nobody Like You - Crossroads Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca037184089deeaea1d06670180276f3c9db9f5b73e24105e989185d82ad9c3. 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/IT4SR1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f7d6a3188a7c3bbd194da7689abaa8ee6dd09b7d671047f89ba6c863736f8a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IT4SR1400001.
Sunday Afternoon - Crossroads Soulful Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fb63a8b5b1554d6598acbaf1118903d2389089752cdd07469aa6f1bd69b312. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/IT4SR1400002.