Hello Apneli,
when I discover a TB-stampmark I always make a photo, which I add to my discovery-log. Furthermore I have an excel-list beginning with the TB-name, alphabetically sorted (TB00001, TB00002, TB00003, ...), Sure, you have to spend some time having it updated, but I recognize every TB, I know the owner and where and when I already found the same TB-stampmark. Have a look at my photo-gallery, you will find a lot of TB on cars or TB-stampmarks there. If you're interested in an accurate documentation, I see no other way than creating an excel-list.
Kind regards, Gubemax.