Blockchain auditing system and method

A copy of a blockchain is stored. The stored copy of the blockchain is copied from a blockchain in a distributed blockchain ledger. An event associated with the blockchain in the distributed ledger is identified. In response identifying the event associated with the blockchain in the distributed ledger, a compromise of the blockchain in the distributed ledger is identified, such as, identifying one or more blocks of the blockchain that have been compromised. In a second embodiment, a request to add a new block to a blockchain is identified. In response identifying the request to add the new block to the blockchain, a consensus vote to add the new block to the blockchain is monitored. A determination is made to determine if the consensus vote is below a threshold. In response to the consensus vote being below the threshold, an audit of the blockchain is completed.