How to prove that an activity performed was "material participation" in real estate

[Marc Shin]

Hello. I'm going to keep track of my real estate activities in management of an STR, and will track the activities using an activity log. My question is - how do I prove in the time log that I performed a particular activity? For example, if I had a 1 hour conversation with a GC regarding the renovations of the property to get it ready for STR, how do I prove that I performed that 1 hour conversation in the log? Do i take a snapshot photo of my outgoing phone call to the GC or can I simply summarize in the log that I had the 1 hour conversation with the GC and summarize the details of the conversation?

Also, if the contractor is performing the work or the repairs on the property, can I count that time the GC spent as my own time in the activity log since he was doing the work on my behalf?   Or can i only log the hours that I spent in communicating with the GC regarding the work?   TIA