OracleChain is the world's first application built on an EOS ecosphere. It aims to efficiently connect blockchain technology services with real-life scenarios in the Oracle ecosystem. By adopting the autonomous Proof-of-Reputation & Deposit mechanism, OracleChain serves as a fundamental service for other blockchain applications. It provides Oracle services for both real-world data and cross-chain data. OracleChain can perform the functions of prediction market applications like Augur and Gnosis, as well as support smart contract businesses like Robo-Advisor that require high-frequency access to external data. The mission of OracleChain is to link the real world with the blockchain world by creating an infrastructure that facilitates data connectivity within and beyond the blockchain.