If non-tech is equally effective, then non-tech!
So, in essence, 'the two angles thing' makes faking just unreasonably difficult, and the date on a piece of paper ensures that the photos-from-two-angles are not of bullion long sold.
Pretty much, yep. Less is more with this stuff, I think. Get it secure enough for our purposes and then let it be. Life is complicated enough already

Will some one 'Second!' Guy's Verification post?
I second the verification post as it satisfies our requirements in its current form, I reckon. Cheers.