BIP 301, outlined in BIP-301, complements the drivechain idea by detailing a method for ‘blind merged mining.’ It allows miners to secure multiple sidechains without individually validating them, collecting fees from sidechain transactions in the process.

By decoupling validation from mining, BIP 301 aims to minimize overhead while preserving incentives to keep sidechains honest. Critics, however, question whether blind merged mining might concentrate influence among large mining pools or complicate the fee market. Still, it’s a noteworthy vision for how sidechain-based Bitcoin expansion could evolve.