I don't think having a picture of a car verifies that you own it.
It cost $500. It is done at a dealer. They document what engine or trans is in the car now. They will state if they are matching or mismatched. They will not provide the engine and trans numbers if they are mismatched.
Porsche Classic Technical Certificate - Porsche USA
www.porsche.com
They do provide much more data about the car than BMW provides. I'll bet there are many E9 (and other rare BMW) owners that would be glad to pay $500 for the type of information Porsche provides.
Yes, definitely. Now that I think about it, I had to show pics of the title, id and photos of the engine/chassis. It was about 18 months ago...