credence
Predict the discrepancy before someone finds it
If your number will not match what a reader computes, say so in advance and say why. This converts every future disagreement into a confirmation.
A published total was known to disagree with independent counts. Rather than defend it, the page stated the range any count would land in and the reason. All four figures then in circulation fell inside it — including one the site itself had published and later corrected. Under the new wording that earlier figure would have been consistent all along.
It also makes the claim falsifiable in the useful direction. A count outside the range means the page is wrong, which is something you would want to know.