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 0x4e3680b5fd5ab7d29e04e226859b95d454b2746fb868b5b84c9542bb92f96d11. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c04b17c-c1c7-4332-a48c-4a02d5563207.json and https://artists.proofprofile.net/proofs/artist/9c04b17c-c1c7-4332-a48c-4a02d5563207.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 0x9c2b03e55d56f403e3f4e9495a813cc5ddb0e12294a02f3a8c782f20d0fc7535. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USDY41810287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b71236dff5dcebb62ef3887fdf1b804e9c7190d56b0ad92d1159a125d89d67. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:35:07Z), 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/USHM92265774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff084d3b3a57210eb5732622c4d48b8ccf8bdaa3a40bd36e2d17af972f8055. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM92265775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dca20802c645ffaee9bd08aa7f6a3ec33821ae873fd80c4533707d852870c53. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM92265776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0ea7f108114c614f659673c3022b90b2cbc36e2c837aaa4eb6d5b20691e557. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USHM92265777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e660cb472989bbd3aa334780f5b1826a43c3034cf95910caafea6604ef045. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM92265778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fb3b671dac150c44f3aebe169f032a0132de3bae201a0f57f8c7c0454bdb6d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USHM92265779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91023f4499502a0021ded8da168a68745419ee2a033253f77a1af8916a1a4647. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM92265781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789c8fd89cb9e5c76dcb0835efc36dcfa66726aa2183082c974e35d375e3408d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM92265782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847fc18867538b477055b6ccf15efa6ddaf339d32994535ed0c5e318e55d6857. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM92265783.