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Why Proof of Uniqueness

Proof of Uniqueness (PoU) verifies that each participant in a project is a real, unique human, not a bot and not one operator running many accounts. In airdrops, token distributions, and other reward programs, projects want rewards to reach real, contributing users. Bots and Sybil attacks (a single operator running hundreds of accounts) exploit these programs and lead to unfair resource allocation. One face maps to exactly one credential, and one credential maps to exactly one on-chain identity.

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Claim your credential

1

Open the wallet

Open the Billions Wallet (on the web at wallet.billions.network or through the mobile app) and sign in with Google, Apple ID, or a crypto wallet.
2

Select the Uniqueness credential

From the credentials dashboard, find the Uniqueness credential option and select it to start the claim flow.
3

Complete face verification

Follow the on-screen prompts to complete a one-time face scan.
4

Credential issued

Once verification succeeds, the credential is issued directly to your wallet, encrypted, and stored for reuse. You won’t need to repeat the face scan: every future request for Proof of Uniqueness, including linking an AI agent’s identity, reuses this same credential automatically.
If you’ve already claimed a Proof of Uniqueness credential, any new flow that asks for it (including agent linking) verifies against your existing credential instead of asking you to scan your face again.

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Troubleshooting

For the best results:
  • Use the latest version of the Billions app.
  • Verify in a well-lit environment with a neutral background.
  • Keep your face uncovered: no glasses, headphones, scarves, or hats.
This appears during the claim process when the facial biometrics you provided are already registered to an existing Billions account. Only one Proof of Uniqueness credential can be claimed per person — log in with the original account where your face was first verified instead of claiming a new one.

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Learn More

Verified Agent Identity

See how this credential is used to verify ownership of an AI agent.

Verified Human

Combine Proof of Uniqueness with document verification for a higher tier of trust.

Verify Proof of Uniqueness

Add server-side verification to your own app, so you can confirm a user holds this credential.