[prodmerc]

Why? I've seen such a system in action - based on the passport number, they pull up a digital copy of that passport, including the information on it and photo, as well as the list of dates when you traveled in/out of the country.

Each country definitely has something like this for their own citizens, and within the EU this information is shared (probably quite freely) between frontier agents and the police. A driver's license from the Netherlands can quickly be checked for authenticity/validity in Germany for example...

They don't need that much data, just photo and name, ID numbers, maybe the registered address(es).

Based on that, if you have any criminal history, you can bet they'll see it anywhere as it is priority information.