A base blockchain refers to the foundational layer of a blockchain network. It is the primary ledger and protocol upon which other technologies and applications are built. Examples of base blockchains include:

	1.	Bitcoin: The first and most well-known blockchain, primarily used for peer-to-peer digital currency transactions.
	2.	Ethereum: A blockchain that supports smart contracts and decentralized applications (dApps) through its programmable platform.
	3.	Binance Smart Chain: A blockchain that runs parallel to Binance Chain, offering support for smart contracts and decentralized applications.

Base blockchains typically provide the underlying infrastructure for recording transactions, maintaining consensus, and ensuring security. They serve as the core upon which secondary layers or applications (such as layer 2 solutions, sidechains, or dApps) are developed and operated.