What network is Audius on?

Could you please clarify which network Audius is utilizing? As a platform within the decentralized finance and cryptocurrency space, it's essential to understand the underlying blockchain infrastructure that supports its operations. Is Audius built on a popular blockchain like Ethereum, or does it leverage a lesser-known or proprietary network? Understanding the network foundation of Audius can provide valuable insights into its functionality, scalability, and potential for future growth.