Rubaab () is a 2026 Indian Marathi-language romantic-drama film directed by Shekhar Rankhambe in his directorial debut and produced by Zankar Films and Zee Studios. It stars Sambhaji Sasane and Shital
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 0x3796d666f0c3184239331e5b5f856e2eb850631f2e862c781c2cc92988931868. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cec463c2-c9a5-46b4-baf7-45e5043148af.json and https://artists.proofprofile.net/proofs/artist/cec463c2-c9a5-46b4-baf7-45e5043148af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).