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 0xee3778503625b4150667b496a42650b6eaac6d07c564f47c65039c8a423348cc. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/deb4bc09-a336-4272-8d85-33e1e508accb.json and https://artists.proofprofile.net/proofs/artist/deb4bc09-a336-4272-8d85-33e1e508accb.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 0x898da42b9f7a4234e03815b1f291c9bdf286819cfe768894b48ea44c397afbb8. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:06:02Z), 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/TCAIR2492340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebf433103b3c5dc41f2cd692d628f61107dac7702b1d623d1b05f38aedf9f5d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAJP2506375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4df1609acf3a3bbb5d966e9195f42830cfcbf4ccb9e8fe23e804f46d203f4d93. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-17T00:13:01Z), 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/TCAJP2519052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2e04c6e4edff2523a5c7fa36bf0470219f0652a4be7289c2b91655a637207. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJQ2556836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef8823119c3754ab190204049c107359693457976329dc8427516723b3305b5. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:33:36Z), 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/QT6622586753.