The primary blockchainAs a distributed ledger technology (DLT), a blockchain is a digital ledger that can create an immutable record of transactions.... Read More is the first and most important chainA chain is a linear sequence of data blocks. Each block contains a cryptographic hash of the previous block and... Read More in a blockchain networkA blockchain network is a decentralized system that allows for peer-to-peer transactions. The main components of a blockchain network are... Read More. The primary blockchain differs from sidechains in that the latter are subordinate chains that run parallel to the former.