Blockchain-based technologies may have a role to play in the commons. They look set to have significant implications for money, for property and for cooperative organisation going forward. For example, there’s been some discussion about how the blockchain could support new forms of peer-production, and fully decentralised infrastructures for applications as varied as finance, mesh networks, cloud databases and share economies. At the same time, there are a number of other important considerations going forward. These include how key criteria like trust, property and governmentality are architected within a blockchain and what centralising tendencies or emerging possibilities for control might accompany this protocol. A lot of what follows is pretty speculative, but worth discussing in the context of peer-production.