AltLayer is a protocol that supports the launching of “modular” blockchains. Traditional, or “monolithic,” blockchains combine the responsibilities of execution, settlement, consensus, and data availability into a single network. Modular blockchains separate these functions into independent layers that can be tailored to specific functions. Modular layers (e.g., leveraging Optimism’s OP Stack to build an execution layer, the Ethereum Virtual Machine (EVM) for settlement and consensus using EigenLayer restaking, and Celestia for data availability) are combined to create novel modular blockchains.