DD2 could refer to: DD 2 or DD Metro, a former Indian public TV channel Dhilluku Dhuddu 2, a 2019 Indian horror comedy film Destruction Derby 2, a 1996 video game Double Dragon II: The Revenge, a
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 0x884506088d7233318a5dd6fffc98bf90fef5cc11efdadc9e6474693c71496d63. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03b94944-9f1e-4910-8cea-cf20e1451437.json and https://artists.proofprofile.net/proofs/artist/03b94944-9f1e-4910-8cea-cf20e1451437.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).