ChainCred is a decentralized platform for issuing, verifying, and managing academic and professional credentials on the Ethereum blockchain. It eliminates the friction and fraud associated with traditional paper certificates by creating an immutable, cryptographic record of achievement. Users interact with ChainCred through a sleek, modern React frontend. Institutions can connect their Web3 wallets to mint tamper-proof digital certificates directly on-chain. Once issued, students and employers can instantly verify the authenticity of a credential using a simple QR code or transaction hash without relying on any centralized verification authority. The platform handles everything from certificate issuance to on-chain revocation and features a unified dashboard for issuers to manage their entire history. The project is fully open-source, deployed on the Ethereum Sepolia Testnet.

Architecture

Key Features

Tamper-Proof Issuance: Institutions can issue certificates that are permanently anchored to the Ethereum blockchain. Data is immutable and cannot be altered once confirmed.
Instant Cryptographic Verification: Anyone can verify a credential in seconds using the certificate's unique hash or by scanning its auto-generated QR code.
On-Chain Revocation: If a certificate is issued in error or compromised, the issuing address has the exclusive authority to permanently mark the hash as revoked on-chain.
My Certificates Dashboard: A dashboard where issuers can view all their issued credentials, check live validity status (Active/Revoked), and monitor block confirmations.
Zero Friction Wallet Connect: Powered by RainbowKit, users can connect via MetaMask, Coinbase Wallet, WalletConnect, and more with a single click.
Etherscan Integration: 1-click links to view raw transaction data and block history directly on the Sepolia Etherscan block explorer.
Decentralized Storage Approach: Instead of bloating state, ChainCred utilizes Ethereum event logs (`emit CertificateStored`) for highly gas-efficient data indexing and retrieval.

Why I built this

Whether it’s university degrees or corporate certifications, the system is fundamentally broken: it’s either heavily reliant on vulnerable, easily forged paper documents or locked behind slow, centralized institutional databases that require manual phone calls and emails to verify. The moment I began diving into Ethereum and smart contracts, I realized that blockchain was the perfect infrastructure for this exact problem. By anchoring credentials on-chain, I could build a system where trust is decentralized and verification is instantaneous.