{"id":"tp-24565","type":"article-newspaper","title":"Optimism Upgrade 20 Replaces Output Roots With Multi-Chain Super Root","author":"Simon Yoon","publisher":"TOKENPOST Inc.","url":"https://www.tokenpost.com/news/technology/24565","datePublished":"2026-09-27T08:13:20.000Z","dateModified":"2026-09-27T08:13:20.000Z","language":"en","abstract":"The OP Stack update preserves existing withdrawal proofs while preparing its fault-proof system for future cross-chain messaging.","section":"Technology","references":[{"title":"reported on the OP Stack ecosystem’s secured value","url":"https://www.tokenpost.com/news/technology/23697"}]}