Ozone Chain ($OZONE) is a public blockchain that support DeFi smart contract.
Below are quoted from its website.
Ozone Blockchain is the most extensive network. Ozone Chain (OZONE) is a token of Ozone Blockchain. It is a Decentralized finance coin which is created customer value and provides more secure transactions and payment systems to all over the world users using Decentralized Technology. Through its portfolio of tools, OZONE CHAIN can soon establish a thriving market for authorized buyers and sellers of artwork and other creative digital goods. Ozone provides a highly authentic decentralized ledger to perform the transactions in the Ozone ecosystem. Ozone is less cheap than the other blockchain networks. It offers 5th Layer Security System for its end user.