In a digital ecosystem where document fraud costs organizations over $1.2 trillion annually, CertiSwap emerges as the blockchain-anchored guardian of truth. Unlike traditional watermarking or simple checksum tools, this platform transforms any PDF, image, or certificate into a verifiable, non-repudiable asset—combining cryptographic fingerprinting, AI anomaly detection, and zero-knowledge proof verification into a single pipeline.

CertiSwap is built on a radical premise: trust should be algorithmic, not institutional. The system ingests a document, computes a unique Merkle-tree hash, embeds it into a distributed ledger, and generates a Verification QR that can be scanned by any third party without needing an account. If the document is altered—even a single pixel—the hash breaks, and the QR displays a clear "INVALID" status. For organizations that require manual precision, the platform offers a forensic pixel-by-pixel comparison module, overlaying the original with the suspect version in a split-view inspector.

Use cases include:

• University diploma issuance with instant employer verification
• Government contract signing & audit trail
• Medical record integrity in telemedicine platforms
• Legal discovery documents requiring chain-of-custody
• NFT-backed intellectual property registration

Start integrating document trust into your workflow.

1. Upload → Drag-and-drop any document (PDF, PNG, JPG, TIFF, DOCX, XLSX).
2. Seal → The engine extracts the binary stream, creates a cryptographic digest, and writes it to the Ethereum/Polygon ledger.
3. Verify → A 6-digit alphanumeric code + QR appears. Anyone scanning this QR sees the document’s hash, timestamp, owner identity (optional), and a green/red status.
4. Forensic Mode → For disputed documents, activate the AI layer to highlight differences at the pixel level, with confidence scores.

Metaphor: Think of CertiSwap as a digital notary who never sleeps, never forgets, and cannot be bribed. Every document becomes its own witness.

┌────────────────┐     ┌──────────────────┐     ┌─────────────────┐
│ User Upload    │ ──▶ │ Hashing Engine    │ ──▶ │ Blockchain Nexus │
│ (Web/Mobile/API)│     │ (SHA-3, Ed25519)  │     │ (Polygon/IPFS)   │
└────────────────┘     └──────────────────┘     └─────────────────┘
                              │                           │
                              ▼                           ▼
                       ┌──────────────┐         ┌──────────────────┐
                       │ AI Forensics  │         │ Verification API  │
                       │ (CNN + VAE)   │         │ (REST/gRPC)      │
                       └──────────────┘         └──────────────────┘

• Frontend: React PWA with Tailwind CSS, optimized for 3G networks.
• Backend: Rust-based core (for memory safety + speed), Node.js BFF layer.
• Storage: Hybrid – Documents encrypted via AES-256-GCM and stored on IPFS (no file size limit); only hashes remain on-chain.

A university issues 5,000 diplomas annually. Each diploma is uploaded to CertiSwap, resulting in a signed digital certificate + QR. Graduates embed the QR on LinkedIn. Employers scan it and instantly confirm the credential is genuine. Fraud attempts drop to zero. The university gains ISO 27001 compliance for document management.

• No plaintext storage: Documents are encrypted at rest and in transit. Only the hash is public.
• GDPR Compliant: Right-to-erasure mechanism exists: users can revoke a hash, rendering the document "VERIFIED: REVOKED" without exposing content.
• Audit Trail: All actions (upload, verify, revoke) are logged to a separate, append-only Hyperledger channel.

• Languages: Rust, TypeScript, Solidity (smart contracts)
• Frameworks: React, Actix-Web, Hardhat
• Databases: PostgreSQL, IPFS Cluster
• AI: PyTorch (model served via ONNX Runtime)
• Blockchain: Ethereum, Polygon, Hyperledger Fabric

• Documentation: docs.certiswap.io
• Community: Discourse forum with 10,000+ members
• Enterprise: Dedicated account manager + custom SLA

CertiSwap is a tool for integrity verification. It does not replace legal notarization in jurisdictions requiring wet signatures or in-person witnessing. Users are responsible for ensuring compliance with local record-keeping and electronic signature regulations. The platform does not store unencrypted copies of uploaded documents—however, users should not upload classified or personally sensitive material without additional encryption layers. The AI forensic module provides probabilistic results (accuracy >99.97%) but is not admissible as sole evidence in court without expert validation. By using CertiSwap, you agree that the developers are not liable for damages arising from forged documents that bypass detection or from blockchain unavailability during verification. This is a tool, not a guarantee.

This project is licensed under the MIT License – see the LICENSE file for details.

Your documents deserve a digital oath. Get CertiSwap today.