Blind Merged Mining (Consensus layer).

Would let Bitcoin miners earn fees from other blockchains without running their software, by selling the right to make each block.

Normally, to mine another chain alongside Bitcoin, miners must run that chain's software and get paid in its coins. Here, users of the other chain build its blocks and bid in bitcoin for the right to have theirs accepted. Miners take one winning bid at a time and are paid on Bitcoin.