Unpermissioned ledgers, also known as permissionless ledgers, refer to blockchain networks that allow anyone to participate in the network without requiring explicit permission or authorization. In unpermissioned ledgers, any user can join the network, validate transactions, and contribute to the consensus mechanism. Bitcoin is an example of an unpermissioned ledger, where anyone can participate as a miner or node in the network, ensuring decentralization, openness, and censorship resistance.
