What is the written record?

Excuse me, could you elaborate on what is meant by the term 'written record' in the context of cryptocurrency and finance? I'm particularly interested in understanding how it applies to transactions, the blockchain, and perhaps even regulatory compliance. Are we referring to physical documents, digital logs, or some other form of recorded data? Additionally, how crucial is maintaining an accurate and up-to-date written record for ensuring the security, transparency, and overall health of the cryptocurrency ecosystem?