Gazotc is a decentralized OTC platform. Traders host assets and issue orders through smart contracts. Users can freely withdraw assets without being controlled by the platform and any third party without transactions. During the transaction, assets can only be transferred between the two parties. If there is a dispute, the decentralized arbitrator will replace the centralized customer service to resolve the dispute. The platform currency GAZ will be used for transaction deposits and arbitrator deposits. The platform conducts real-name authentication and AML through a third-party KYC certification agency. Sensitive information of users is stored in smart contracts through hash encryption. The project party does not save any information of users. Both parties to the transaction communicate through third-party social software or asymmetrically encrypted private messages. The platform charges a transaction fee, which is mainly used to repurchase GAZ and destroy it.