How to verify a human without KYC or biometrics

The problem

Document KYC turns your product into a data-breach target and blocks users in whole regions. Biometric personhood requires hardware most people will never touch. Vouching needs nothing but the people a user already knows.

Step by step

1. 1. Check uniqueness

   unique_interactions is the count of distinct humans who signed an attestation with this identity.

   const p = await tl.verify({ address });
   const isUniqueHuman = p.unique_interactions >= 3 && p.trust_score >= 30;

2. 2. Ask for a fresh signature

   For sensitive actions, require a live wallet signature so you know the session holder controls the identity.

   const sig = await signer.signMessage(`TrustLayer verify ${nonce}`);
   const ok = await tl.verifySignature({ address, nonce, signature: sig });

3. 3. Send unverified users to vouching

   Point them at the in-person QR vouch flow. Two mutual vouches from existing humans is usually enough to clear a light threshold.

Frequently asked questions

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