What network does Kujira use?

Excuse me, I'm curious about the underlying technology behind Kujira. Could you please elaborate on the network that Kujira utilizes? I'm interested in understanding if it's built on a popular blockchain like Ethereum or perhaps it's a unique, proprietary network. Understanding the network architecture is crucial for evaluating its scalability, security, and potential for future integrations. Could you kindly provide some insights?