Methods and systems for maintaining a distributed ledger and/or blockchain of transactions and/or events pertaining to autonomous vehicles and/or smart contracts are provided. One or more processors may monitor one or more sensors associated with an autonomous vehicle. Based upon the outputs of the sensors, a change in condition of the autonomous vehicle may be detected. The condition may relate to operation, or an operational state of the vehicle and/or a condition associated with a smart contract. The processors may generate a transaction describing the detected change in the condition of the vehicle. The transaction may be transmitted to an enforcement server. As a result, an up-to-date ledger of autonomous vehicle and/or smart contract transactions and/or events may be maintained.