Patent-Protected Technology
CertainID

Prove you're real
in a world of fakes.

CertainID uses biometric authentication and blockchain to verify your identity without ever collecting your data. Privacy-first. Decentralized. Unstoppable.

Join the Waitlist How It Works
Patent-protected biometric verification technology
0
Data Collected
256-bit
Hash Security
On-Chain
Verification
How It Works

Three steps to sovereign identity

No servers store your data. No company controls your identity. Everything stays on your device and the blockchain.

1

Verify Your Identity

Upload your government ID and take a selfie. Images are hashed locally using SHA-256 — they never leave your device.

2

Biometric Authentication

Scan your fingerprint or face using your phone's built-in security. Your biometric creates a unique cryptographic proof.

3

Blockchain Registration

Your identity hashes are stored on Polygon blockchain. Only you control it. Anyone can verify it. No one can fake it.

Why CertainID

Built for the age of AI

Deepfakes, identity theft, and synthetic media are eroding digital trust. CertainID is the antidote.

Zero-Knowledge Privacy

Your biometric data and document images never leave your device. We prove identity without collecting it.

Anti-Deepfake Protection

Sign your content cryptographically. Anyone can verify it's really from you — not an AI-generated fake.

Fully Decentralized

No central authority. Your identity lives on Polygon blockchain. If CertainID disappears, your identity doesn't.

Social Verification

Link your Twitter, YouTube, and other accounts. Prove your social media presence is authentically yours.

CertainID — Verified Content
CertainID Verified
Verified by CertainID 🛡️ https://app.certainid.io/#/v/0x99f428792615e9d595b3b5c77e52fdbe6cb233fed7665540d3228ca8a25cec7b
Content Authentication

Prove your content
is really yours.

Sign any image, video, or document with your biometric identity. A cryptographic fingerprint is registered on-chain — permanently linking the content to your verified identity.

No one can fake it. No one can steal it. The proof lives forever on the blockchain.

1
Sign in the CertainID app Upload your image — a SHA-256 fingerprint is computed on-device and registered on Polygon blockchain.
2
Post with a verification caption Copy the verification link from the app and include it in your post caption or description.
3
Holographic badge appears automatically The CertainID browser extension detects the link, verifies it on-chain, and overlays the badge on your content — on any platform.
Verify this image live on-chain
Use Cases

Identity for every industry

From content creators fighting deepfakes to governments modernizing citizen services.

Social Media

Verify creator identity

Finance

Decentralized KYC

Government

Digital citizen services

E-Commerce

Fraud prevention

Join the waitlist

Be the first to experience sovereign digital identity. Early access launching soon.

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Talk to our AI Assistant

Ask about CertainID, biometric verification, or how it works — by voice.