I think you're on the right track.
The instructions that came with my chamber-type laser boresighters referenced a card that was included, but I believe any business card would work.
The instructions said to sight in your rifle, using the laser as an aid as to where the bore was aligned. This is commonly referred to as "getting on paper" and its about all the laser is going to do. (For a bolt-action rifle, it's roughly equivalent to removing the bolt and looking down the bore to center it on the target.) Don't try to make the reticle and laser dot coincident...the bullet path is curved and the laser dot is a straight line.
After completing a normal "zeroing" process by alternate firing and adjusting the scope, the instructions say you can optionally insert the laser again. Set up their "business card" at around 10 yds or so. Measure the distance so you can set it up at exactly the same distance in the future. Mark the reticle location and the laser location on the card, using a different mark or color for each. They will not be coincident.
Now, at some time in the future (say, after baggage handlers have had a chance to toss your cased rifle off a belt onto concrete), you can set up the business card again and verify that the scope reticle is still in the same location relative to the laser dot.
This should also verify that a quick-detach scope mount returns to zero.