A brass sheet with painted symbols ,, that’ll last about a year here in Florida ,, unless the symbol is etched where it is EASY for someone to renew it by wiping black paint into the receses it’s worthless.
Not only that, but an adhesive backed piece of brass will stay put maybe a few months. Notice the textured background she's putting it on. Maybe a QR code laser etched into the monument itself would be more appropriate.
As the family genealogist, I like the premise, but wonder how long QR codes will stay in vogue.
Also, if anyone’s contemplating doing something like this, make sure the url embedded in the QR code points to a domain name and location you own and control.
Don’t: www.some_service_for_grave_qr_codes.com/johnrsmith-1963
Do: www.some_domain_name_you_own.com/johnrsmith-1963
This will potentially cost more, but for something like this, you’d be ill-advised to trust and pay for another web saas to stay in business and not raise prices (no matter what the initial pitch is).
Note: I haven’t researched any sites that provide this service. Sounds like a decent and desired service possibility though. Just beware of having QR codes made to point to urls that you don’t absolutely control.