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 0x3b0e7b9312ec0295846caf75a9b019a85e104969352a0026c1cefc28c1f3dbca. 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/9ab8a997-7bb2-4344-85dc-cd97cb46283d.json and https://artists.proofprofile.net/proofs/artist/9ab8a997-7bb2-4344-85dc-cd97cb46283d.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 0x45d4d6bb0802d92f57f8d8d59b41ec40abf0bc20ccf7450db6d903fea86af96c. 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/BCDLE2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1cf6f291dee6979c46d32ad008567393020130b9b58711faf550d6f64acfac. 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/BCDLE2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6865a80c09f52efbb504235e7ad1c349d70fa4ea0374146ddca8ba118aece617. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BCDLE2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752a9892bc5b187205b299b5335be9a70403dc741f16f2917f01545ee77916ed. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BCDLE2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82cc257a5cb2daba83491589bac1cb509f26894cc10d4ee78b365b450ff8fcb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BCDLE2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac06d9b95c51f669c3fbebbe68e5a44aadc186a8ae62c3904884265a22bf67d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:45:15Z), 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/BCDLE2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8c35aa8b1a931a8a1984588532ad43d57470ddb7ef080d6016aca33e204aa9. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/BCDLE2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e95a600659ef2fed430803161a7221ee6a509bd931aedd73b25b65565b39642. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/BCDLE2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ab610a05bf3f1d91925aed1ec908bb701c9baba46636649b3cd52ea5ccc174. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/BCDLE2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cec0f340e792f68ae3c5b1601de3537a2c55e3fc7ee9e80711a3c9284b952c3. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:22:14Z), 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/BCDLE2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278cc0b4de36314a87ab835065d500577e55f2904b0beaa07eb3bbdd143223c9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/BCDLE2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96628c596cacc5ab84ada509a4012d4f6bc95c9b277c8899d0fffac727a67001. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BCDLE2500011.