Question
What counts as proof of a burst pipe?
Proof of a burst pipe is a receipt, a line on a bank statement, a photograph with a date on it, or a repair invoice. Two weak ones together usually settle it where one on its own does not.
With a burst pipe the useful photograph is the one taken before the water is cleared, and the useful note is the time the water was shut off.
An emergency plumber writes an invoice saying what failed and where. That invoice does more work than any description written afterwards.