Record which revision of a proof was sent to the reviewer.
Send the current proof to its reviewer and log the revision on the card.
Your reviewer gets the current image or PDF and a clear question. Your review card shows which revision you sent.
Log the proof version at each review handoff.
Your review card shows the proof version your reviewer received, even if the linked file changes later.
Invite proof reviewers and record the revision at handoff.
Your reviewers get the proof link, while your review ledger shows which revision you shared with them.