# Proof Of Personhood (PoP)
Hypersign’s PoP leverages video KYC and [Zero-Knowledge Proofs (ZKPs)](/hypersign-kyc/concepts/zero-knowledge-proof-zkp.md) to verify if a specific account (or wallet address) belongs to a real human.
### How It Works?
1\. **Video Capture and Verification**
The process begins with a user submitting their video KYC through Hypersign's KYC Widget. Once the video is collected, it undergoes a series of AI-driven checks:
* **Liveness Detection**: The AI model uses liveness detection to confirm that the person is physically present in real-time, as opposed to a static image, video replay, or deepfake. This involves subtle movement analysis, such as blinking, head movements, and sometimes following prompts like changing gaze direction or smiling.
* **Anti-Spoofing Measures**: The AI model detects spoofing attempts, such as using photos, videos, or masks. Techniques like depth analysis and light reflection analysis differentiate between a real face and 2D images or video screens.
2\. **Credential Issuance**
Once all checks pass, the KYC issuer provides a Personhood Credential. This credential confirms that the user has passed all necessary verifications and includes a digital signature from the issuer. The user then stores the Proof of Personhood credential securely in their data vault.
3\. **Zero-Knowledge Proof (ZKP) Generation**
After receiving the credential, the user generates a [zero-knowledge proof (zk proof)](/hypersign-kyc/concepts/zero-knowledge-proof-zkp.md) of it. This proof, also known as the Proof of Personhood (PoP), is created by submitting the credential to a custom-built [zk circuit](/hypersign-kyc/concepts/zero-knowledge-proof-zkp/circuits.md), where a groth16-based zk proof is generated. This proof maintains privacy while verifying personhood.
4\. **Proof of Personhood Token Generation**
Finally, the user submits the Proof of Personhood (PoP) to the issuer's smart contract, requesting a Hypersign KYC Token, which is a Soulbound Token signifying Proof of Personhood. The smart contract verifies the zk proof and mints a token directly to the user’s wallet, establishing a blockchain-backed verification of personhood.
---
# 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.hypersign.id/hypersign-kyc/concepts/zk-proof-types/proof-of-personhood-pop.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.