By CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data

Similar “proof” technology is used by all layer-2 rollup networks, including Optimism competitors like Arbitrum. It’s meant to ensure that a rollup’s users–be they NFT traders, retail investors, or big-name financial institutions–can trust Ethereum’s sprawling operator network, rather than the rollup’s own internal systems, to record their transactions and withdrawals accurately.

Source: CoinDesk: Bitcoin, Ethereum, Crypto News and Price Data