• Mr.Sagar Dhanake
• Ms.Sunakshi Gaikwad
• Ms.Suhani Zodage
• Ms.Rutuja Ingale
• Ms.Akshata Gangurde

In today’s digital environment, verifying educational and professional certificates remains a complex task due to widespread document forgery and manipulation. Conventional verification systems rely on centralized databases that are vulnerable to security breaches, human errors, and high operational costs.This research presents “Chain of Trust”, a blockchain-based digital certificate validation system built on the Polygon Amoy Testnet to ensure security, transparency, and real-time verification. The system integrates smart contracts, Web3.js, Remix IDE, MetaMask, and IPFS to create a fully decentralized and automated validation process. Certificates are hashed and stored on the blockchain, ensuring immutability, while QR codes provide instant verification access. The proposed model ensures trust, tamper-proof validation, and efficient management of digital credentials across institutions and industries.

Blockchain, Smart Contracts, Polygon, Web3.js, IPFS, Digital Certificate Validation, MetaMask, Truffle, Ganache, Decentralized Verification, Certificate Hashing

"Chain of Trust: Secure and Transparent Digital Certificate Validation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 11, page no.a630-a635, November-2025, Available :http://www.jetir.org/papers/JETIR2511075.pdf

"Chain of Trust: Secure and Transparent Digital Certificate Validation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 11, page no. ppa630-a635, November-2025, Available at : http://www.jetir.org/papers/JETIR2511075.pdf