Certana Documentation¶

Welcome to the comprehensive documentation for Certana - a production-grade content authenticity platform powered by blockchain (Solana) and machine learning.

Overview¶

Certana is a multi-component platform designed to verify image authenticity at the pixel level using:

Neural Watermarking - Invisible watermarks embedded in images
Perceptual Fingerprinting - Content-based image fingerprints using CLIP and DINO models
Blockchain Commitments - Immutable records on Solana blockchain
C2PA Integration - Coalition for Content Provenance and Authenticity standards
Metadata Tracking - EXIF, TIFF, and other metadata preservation

Architecture Overview¶

┌─────────────────────────────────────────────────────────────┐
│                     Certana Platform                        │
├─────────────────────────────────────────────────────────────┤
│                                                             │
│  ┌──────────────┐  ┌──────────────┐  ┌──────────────┐     │
│  │  Browser     │  │  Mobile      │  │   Website    │     │
│  │  Extension   │  │  Frontend    │  │  (Next.js)   │     │
│  └──────┬───────┘  └──────┬───────┘  └──────┬───────┘     │
│         │                 │                  │              │
│         └─────────────────┼──────────────────┘              │
│                           │ HTTPS                           │
│                    ┌──────▼──────┐                          │
│                    │  FastAPI    │                          │
│                    │  Backend    │                          │
│                    └──────┬──────┘                          │
│                           │                                 │
│    ┌──────────────────────┼──────────────────────┐         │
│    │                      │                      │         │
│    ▼                      ▼                      ▼         │
│ ┌────────┐          ┌──────────┐         ┌────────┐       │
│ │Database│          │ Services │         │Storage │       │
│ │PostgreSQL         │(ML, Enc) │         │IPFS/S3 │       │
│ └────────┘          └──────────┘         └────────┘       │
│                           │                                │
│                           ▼                                │
│                    ┌──────────────┐                        │
│                    │   Solana     │                        │
│                    │ Blockchain   │                        │
│                    └──────────────┘                        │
└─────────────────────────────────────────────────────────────┘

Key Components¶

Backend (FastAPI + Python)¶

RESTful API with OpenAPI/Swagger documentation
Async database operations with SQLAlchemy
ML-powered image analysis and watermarking
Blockchain integration with Solana
Comprehensive authentication and authorization

Frontend (React Native + Expo)¶

Cross-platform mobile application (iOS, Android, Web)
Image upload and verification interface
History tracking and detailed results
QR code generation for asset sharing

Extension (Vue.js + WXT)¶

Browser extension for Chrome/Firefox
On-the-fly image verification on any website
Inline result display
API key management

Getting Started¶

Quick Start¶

Backend Setup

cd backend
pip install -r requirements.txt
python src/main.py

Frontend Setup
```
cd frontend
npm install
npm start
```
Extension Setup
```
cd browser
npm install
npm run dev
```

Documentation Structure¶

Backend - API design, database schema, services, and deployment
Frontend - Component architecture, state management, and mobile UI
Extension - Browser integration, manifest configuration, and publishing
Development - Contributing guidelines, testing, and best practices
Deployment - Docker, Kubernetes, and CI/CD pipelines

Key Features¶

✅ Pixel-Level Verification - Neural watermarking at imperceptible levels
✅ Blockchain Immutability - Tamper-proof records on Solana
✅ ML-Powered Analysis - CLIP, DINO, and PDQ fingerprinting
✅ Multi-Platform - Web, mobile, and browser extension
✅ Quota Management - Tiered usage tracking and rate limiting
✅ Enterprise Ready - Organization support, API keys, and SSO

Technology Stack¶

Component	Technology
Backend	Python 3.11, FastAPI, SQLAlchemy, PostgreSQL
Frontend	React Native, Expo, TypeScript, React Navigation
Extension	Vue.js 3, TypeScript, WXT Framework
ML Models	PyTorch, Transformers, Sentence Transformers
Blockchain	Solana, Anchor, Web3.js
Storage	IPFS, Filecoin (Lighthouse), AWS S3
Database	PostgreSQL 15+, pgvector for embeddings

API Endpoints¶

All APIs are REST-based with JSON payloads:

POST /v1/assets/ - Upload and process image
POST /v1/verify/ - Verify image authenticity
GET /v1/assets/{id}/ - Get asset details
POST /v1/api-keys/validate - Validate API key
POST /v1/auth/register - User registration
POST /v1/blockchain/commit - Create blockchain commitment

Need Help?¶

License¶

Last Updated: October 2024
Version: 1.0.0