Is Sandbox based on Ethereum?

Could you please clarify for me whether Sandbox is indeed founded on the Ethereum blockchain? I've been hearing different opinions about its technological infrastructure and I'm curious to know the truth behind it. Is it built specifically on Ethereum's platform, leveraging its smart contract capabilities and decentralized nature? Or does it utilize a different blockchain technology altogether? I'm eager to understand the technical aspects of Sandbox and how it fits into the larger cryptocurrency and blockchain ecosystem. Thank you for your assistance in clearing up this confusion.