Is Metis built on Ethereum?

Could you elaborate on the technological underpinnings of Metis? Specifically, is it indeed constructed on the Ethereum blockchain? This query aims to gain clarity on the technological architecture and infrastructural dependencies of Metis. Understanding whether it leverages the robust and widely adopted Ethereum platform would provide valuable insights into its potential scalability, interoperability, and overall ecosystem integration. Your response would greatly assist in assessing the technical merits and long-term viability of Metis.