Build a Blockchain-Powered KYC Verification System
Create a decentralized platform where users can complete KYC once and reuse it across multiple services using blockchain and verifiable credentials.Traditional KYC processes are repetitive, costly, and controlled by centralized authorities. Blockchain enables a self-sovereign identity model where verified credentials can be reused, tamper-proofed, and privately shared without data leaks.
Develop a decentralized KYC platform where users upload their documents once, get verified by an authorized validator, and share zero-knowledge proofs or signed attestations with financial or digital service providers.
Single KYC Submission
Users upload their documents and complete identity verification only once with a trusted validator.
Decentralized Identity Ownership
Users store their credentials in wallets and control when/how to share them.
Smart Contract Attestations
Verified KYC status is published on-chain using attestations without revealing personal data.
Reusability Across Platforms
Once verified, users can onboard into banks, exchanges, or apps with a single click.
Users submit identity documents via the frontend. Validators (banks, government) approve and sign a verification credential. The hash of this credential is stored on-chain. Service providers verify authenticity by checking the smart contract and optionally using zero-knowledge proof verification.
- Smart contract for storing and querying verification status
- Verifiable credential format using DID standards
- React frontend with file upload and credential sharing
- IPFS for storing encrypted identity documents (optional)
- Wallet-based login and signature-based sharing
Blockchain
Ethereum or Polygon for smart contract deployment
Smart Contracts
Solidity with role-based credential issuance and validation
Identity Standards
W3C DIDs + Verifiable Credentials, EIP-712 signatures
Frontend
React.js with Web3.js, IPFS for document storage (optional)
1. Design Credential Verification Contract
Create smart contracts that store user verification status and validator approvals.
2. Build Document Submission Flow
Allow users to upload documents and request verification from trusted entities.
3. Issue Verifiable Credentials
Let validators issue signed attestations, and store a hash on-chain for integrity.
4. Integrate Reuse via DID Authentication
Enable users to share credentials with other services via signature requests.
5. Test KYC Scenarios
Simulate user flows from verification to onboarding into exchanges, banks, and platforms.
Simplify KYC with Blockchain-Powered Reusability
Build a trusted, reusable identity platform that protects user privacy while streamlining compliance.
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