What chain is Tezos on?

I'm curious to know which blockchain network the Tezos cryptocurrency operates on. Given the numerous options in the crypto landscape, it's important to understand the underlying technology that powers a project. So, could you please clarify which chain is Tezos based on? I've heard about various blockchains like Ethereum, Bitcoin, and even self-developed chains, so I'm keen to know if Tezos falls into one of these categories or if it utilizes a unique blockchain solution altogether. Clarifying this detail would help me better assess the potential and use cases of Tezos in the crypto ecosystem.