Saving additional data into workflow history

I wonder if there's any way of adding additional node data into the workflow history? Or enable a new logging/history mechanism.

My problem is that I'd need to track information about state changes and node reference -fields at the same time. So I'd know, what was the value of the node reference field in time the state was changed.

Case in question:
An artist (authenticated user) has artwork which has a state (i.e. Sent, Sold, in Gallery, in Warehouse, etc...) and also a location (Gallery Lorem, Gallery Ipsum, Own warehouse, suppliers warehouse, etc.). The artist needs to have a log of which locations have had which artwork between a timeframe.

Any ideas would be appreciated!