ReadOnlyReg

ReadOnlyReg is a blockchain-powered data integrity platform built on Polygon. Register documents, issue certificates, log sensor data & verify records — all secured by smart contracts that ensure your data can never be altered or deleted. PROOF OF EXISTENCE Hash any document or text and register it on-chain as permanent, timestamped proof. Choose Basic registration for hash-only proof, or Certified for verified and notarized records. CERTIFICATE REGISTRY Issue tamper-proof digital certificates to any Ethereum address. Perfect for diplomas, credentials, licenses & compliance documents. Recipients can verify authenticity instantly. PUBLIC RECORDS LOGGER Log sensor readings, IoT data, or any structured records on-chain with full transparency. Search by sensor ID, look up entries by ID, or browse all records. SUBSCRIPTION PLANS Subscribe with POL directly from your wallet for hands-off access. Pro subscribers get certified registration fees waived and automatic authorization as data providers & certificate issuers. BUILT-IN WALLET Create or import an Ethereum wallet secured by your device's keychain and biometrics. No external wallet app required — sign transactions directly within the app. KEY FEATURES - Tamper-proof document registration with Keccak-256 hashing - Digital certificate issuance and verification - On-chain sensor and public records logging - Built-in HD wallet with biometric security - QR code scanning for wallet addresses - OCR camera scanning for quick data entry - Real-time on-chain verification - Polygon network for fast, low-cost transactions