Description
The Blockchain Certificate Verification System is a powerful, decentralized project that uses Ethereum smart contracts to issue and verify academic or professional certificates. By storing SHA-256 hashes of certificates on the blockchain, this system makes fake certificates impossible to forge or manipulate — ensuring complete trust and transparency in credential verification.
Key Features
- Smart contract (Solidity) for issuing and verifying certificate hashes on-chain
- SHA-256 hashing ensures certificates are tamper-proof and secure
- Simple file upload interface for instant certificate verification
- Node.js + Express backend with ethers.js for blockchain interaction
- Clean HTML/JS frontend for easy use without technical knowledge
- Hardhat local blockchain environment for safe development and testing
- Optional IPFS integration to store full certificate files off-chain
- Certificate metadata storage alongside blockchain hash records
For complete project details, source code, and setup guide, visit the official project page.
🔗 View Full Project Details – UpdateGadh
Technology Stack
| Component | Technology |
| Smart Contract | Solidity |
| Blockchain Environment | Hardhat (local) |
| Backend | Node.js + Express |
| Blockchain Interaction | ethers.js |
| Frontend | HTML, JavaScript |
| Certificate Hashing | SHA-256 |
| Optional Storage | IPFS (CID-based) |
System Requirements
- Node.js version 18 or higher
- npm package manager
- Hardhat installed via npm
- Modern browser (Chrome/Firefox) for frontend
- Private key from Hardhat local blockchain account
How It Works
The system works in two steps — issuing and verifying. An authorized issuer uploads a certificate file through the backend, which generates a SHA-256 hash and records it on the Hardhat local blockchain via the Solidity smart contract. To verify a certificate, the user uploads the file on the frontend, and the system checks whether its hash exists on-chain. If it matches, the certificate is genuine. If not, it is flagged as fake or modified — giving instant, trustless verification without any central authority.
Perfect For
BCA, MCA, B.Tech, M.Tech, and computer science students looking for a unique, blockchain-based final year project. This system stands out in project evaluations, viva exams, and technical interviews. It demonstrates smart contract development, backend API design, cryptographic hashing, and decentralized application flow — all in one practical project.
Future Enhancements
Future versions can include public blockchain deployment (Ethereum Mainnet or Polygon), QR code generation for certificate verification links, admin dashboard for bulk certificate issuance, email notifications, role-based access control, and a mobile-friendly interface for on-the-go verification.
Watch Project Demo
Watch the complete project walkthrough and step-by-step setup tutorial on our YouTube channel.
▶ Watch on YouTube – Decode It
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