Yep, that's correct. I received the permit as part of a job offer, but unfortunately my job has ended prematurely but the permit is still valid for a while.

Somehow I was under the impression they don't really scan them and just glance over them. Furthermore since it was issued by a specific EU country, I should be ok entering Schengen not via that country, but I guess every EU/Schengen has the ability to see whether the permit is valid?

Another question: if the rez permit is revoked, can't I always enter on my tourist visa? (I have a US passport) since that should come into effect (I've been in the country for 6 months purely on the work permit).