I was reading about a snare of Ellis Tollin and also one of Buddy Rich's that were stolen which instigated the idea.
My collection is relatively small too but if there was a register then there would be no doubt if these drums showed up.
I learned a long time ago to Inventory what I purchase as I acquire it. But I still don't have everything photoed yet? darn!! use a video camera. tell serial#'s distinguishing features, some people use some type of Identification placed inside the lugs etc!
Are we talking individual effort or some kind of registry service here? I think it's a great idea! I'd be willing to help in any way I'd be useful. Not good with paperwork but I've got a lot of time to invest in something worth while.