What chain is Klaytn on?

Could you please elaborate on the blockchain technology that Klaytn utilizes? As a cryptocurrency and finance professional, I'm curious to understand the underlying infrastructure that powers this platform. I'm aware that Klaytn is a popular blockchain project, but I'm interested in knowing if it's built on an existing blockchain like Ethereum or Bitcoin, or if it's a completely new and innovative chain. Understanding this aspect is crucial for evaluating its potential and adoption within the crypto ecosystem.