Certificate Verification using Blockchain Technology

Certificate verification processes are often slow, fragmented, and vulnerable to forgery due to reliance on centralized storage systems. This paper presents Certify-Chain, a decentralized certificate verification system built on the Ethereum blockchain to ensure authenticity, transparency, and trust. The proposed system uses Solidity smart contracts to immutably record certificate hashes, issuer identities, and verification events on-chain. A React-based frontend interacts with the blockchain through Ethers.js, while MetaMask enables secure and user-controlled transaction signing. The system removes dependence on centralized authorities, prevents unauthorized data modification, and enables real-time certificate verification. Experimental evaluation of core operations, including certificate issuance, registration, ownership validation, and verification, demonstrates improved reliability and robustness. The results indicate that blockchain-based architectures provide an effective approach for strengthening the integrity and trustworthiness of digital credential verification systems.