Three scenes
The customer says you did not deliver. You hand them a file.
The auditor asks what the revenue rests on. You hand them a file.
The lender asks what happens when delivery is disputed. You hand them a record they can run themselves.
The turn
Each side files under its own key, against a standard pinned before the window opened. Your counterparty reaches the same result on their own machine.
How a month settles
The standard is fixed before the window opens, and committed by digest.
Each party files its own measurements under its own key.
Six gates read what the evidence supports. The same bundle gives the same answer on any machine.
The party it binds decides. The record names the review that settled it.