If they interpret the law differently, you will be arrested. There is no question in my the crown would drop charges after reviewing the legistration. You'd still be dragged through the courts and the arresting officer would get no more than a five minute "coaching" session from their sergeant.
You might end up arrested, but not likely charged. If they arrested you, you would get hauled in and end up arguing your case with the more senior officers at the station and they should realize the error and let you go. If they don't, then the case would get pushed to the CA and they should realize the error and refuse the case.
It is possible you spend a night in jail and have to work to get your gun back, but there is no way to avoid this in our system if a cop decides to run you through the mill. We are simply vulnerable to that as peons.
I have a question for you - how long have you owned guns? You joined the site in 2018, so I assume it has been at least 7 years. In all that time have you ever had a cop even look at one of your guns or question you on anything related to firearms?
Personally, I have had a license since 2009. I owned inherited guns before that (and did lots of shooting as a teenager), but 2009 was when I became more actively involved in shooting and hunting. I have never had anyone - cop, gun club RO or random shooter at the range ever question anything I did. Nothing about paperwork, trigger locks, mag capacity, or anything else. The only time I have had any scrutiny at all is out hunting and the CO's only care that your rifle is unloaded in the vehicle and that you have the appropriate licenses/tags with you. That's it.
I know people who have been licensed (such as it was) since the 80's and have multiple 12.X classes on their licenses and they have had the same experience in terms of never being scrutinized or checked, anywhere, at any time in 30+ years of competition shooting and range visits. It is vanishingly rare.
Your paranoia is getting the better of you. Just don't be a raging idiot to attract police attention, don't do anything stupid with any gun and enjoy your guns and shooting them. Also, avoid relationships with crazy women who might be inclined to get your guns confiscated when you break up with or otherwise piss them off.
Mark