# Sunscreen - Uniquness Verification #### Proof of Uniquness Every user that goes through our app will be assigned a UUID, this is a unique identifier that will then be assigned and minted onto the blockchain. With every additional wallet our system picks up to be the same user, we assign the same UUID, networking individuals accross wallets. The uniquness verification system is based upon a biometric scan done of the user. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.0xkyc.id/developer-guides/client-or-server-guide/sunscreen-uniquness-verification.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.