Anyone can login to erwin and see their digital service history, for a small fee you can add an entry yourself (though you have to pretend to be a business when you log in).
My car came with three stamps in the book - however only one of them was recorded digitally. I'm now wondering which one is telling the truth. With GDPR regulations, some dealers are removing all paperwork that identifies the previous owner - I don't think this is strictly necessary with GDPR but it seems most are taking this line. Guess its no risk to them. Oh well...