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OpenCert Blockchain Verifier

alfredang/opencert-blockchain-verifier

Verify OpenCerts documents against the Ethereum blockchain

Live demo →  ·  View on GitHub →  ·  Get a quote →

▶ Open live demo — https://opencert-verifier.vercel.app

About the project

A web application to verify the authenticity of OpenCerts documents against the Ethereum blockchain.

Tech stack

TypeScript   opencerts   vercel   Next.js   React   Tailwind CSS   Vercel   Ethereum   Blockchain   OpenCerts

Key features

  • Drag-and-drop upload - Upload .opencert or .json certificate files
  • Network selection - Support for Ethereum Mainnet and Sepolia testnet
  • Three verification checks:
  • Document Integrity - Ensures the document has not been tampered with
  • Issuance Status - Confirms the document is issued on blockchain and not revoked
  • Issuer Identity - Verifies the issuer via DNS-TXT or OpenCerts registry
  • Certificate preview - Displays certificate metadata (name, recipient, issuer, date)
  • Dark mode support - Automatic theme based on system preferences

Project details

Repositoryopencert-verifier
Live demohttps://opencert-verifier.vercel.app
Primary languageTypeScript
Last update31 Jan 2026

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