Ritu may refer to: Arts and entertainment Ritu, a 2013 album by Saille Ritu (2009 film), a Malayalam film directed by Shyamaprasad Ritu (2014 film), a Nepali film directed by Manoj Adhikari Ritu Sa
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc152eecfa591bbba6a31b1326a784f567654d2efd0a1c6440ab5e15d8071e9a2. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b91f1297-b349-4c59-83f3-4b1b0df07429.json and https://artists.proofprofile.net/proofs/artist/b91f1297-b349-4c59-83f3-4b1b0df07429.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).