The effect of blockchain on the finance department

This is for a CPA Insider story that covers the effect of blockchain on the finance department. What are the nature and benefits of the blockchain? What are the use cases in finance? What does happen to the role of the CFO if the uses of blockchain make establishing trust much less expensive? What kinds of deals become possible when the cost of due diligence comes down? Requirements: I need three sources; at least one must be a CPA. I need to complete interviews by the 16th. For reference, I wrote this piece for the AICPA recently