Every credential you issue is a claim: this person knew this, on this day, under these conditions. Every candidate now has a generative AI within reach, which has changed what an unsupervised result is worth and what you need to be able to show. When the claim is challenged, a number in a gradebook is not an answer. The record of how that number was produced is.
Constructor Assess and Constructor Proctor produce that record as one workflow. It answers five things about every exam: what was asked, who sat it, how they worked, what was decided, and what it tells you. Assess answers the first, the fourth and the fifth. Proctor answers the second and the third. You buy the record.