Nandita Das (born 7 November 1969) is an Indian actress and director. She has acted in over 40 feature films in ten different languages. Das appeared in the films Fire (1996), Earth (1998), Bawandar (
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 0x21e9ee50afa3fb9886507e27f518a5352f01f53daab5248e6d71546ad61e97cc. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bf65841-21f4-4ead-8432-25eec288c8aa.json and https://artists.proofprofile.net/proofs/artist/5bf65841-21f4-4ead-8432-25eec288c8aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).