FairWitness is an innovative on-chain oracle that focuses on ensuring the fairness of artificial intelligence models through zero-knowledge technology. It utilizes SHA-256 commitments to securely accept model weights and architectures while processing anonymized inference logs. This approach allows it to generate zk-SNARK proofs, which confirm whether a model meets specified fairness criteria without disclosing any private information. Once a model has been successfully verified, FairWitness mints a tamper-proof NFT that serves as a "Fairness Attestation." This unique digital asset guarantees the integrity of the fairness assessment, providing a reliable credential for users and developers alike. To facilitate seamless interaction with downstream protocols, FairWitness features a lightweight verifier contract. This contract allows for trustless queries regarding a model’s fairness status on-chain via a simple function, ensuring easy integration into various applications. By prioritizing privacy and security, FairWitness addresses critical concerns associated with AI fairness, making it a valuable tool for developers looking to build trustworthy AI applications. The token's utility lies in its ability to foster transparency and accountability in AI model assessments, further promoting ethical AI practices in the ecosystem.