Interesting details, and a glance into the world of total electronic surveillance--still in the future where I live, but apparently an accomplished fact in many places. Always glad to learn something new.

I did a quick check of rules in my home state of Washington: basically, drivers/riders are required to carry a license, registration, and proof of insurance at all times. There is some uncertainty as to whether an electronic copy of registration is valid (the law allows this, but this might apply only to a state-generated electronic version, which doesn't yet exist--not to an iPhone photo). A copy of a license or registration, therefore, will probably not serve; an insurance card is less critical.

On the original topic, I have definitely been required to show original documents at borders--not always, but on occasion. I've also been required to show original documents at police stops. I've got a vague memory of an overland rider being turned back at a border because they only carried a photocopy, but I can't remember whether I actually saw this or merely heard about it.

I really don't see the downside to carrying originals. Surely if the police know who I am and whether I own the vehicle in question before they flip on their flashing lights, they're capable of knowing whether a stolen bike belongs to me without my proving it by showing a registration document, right? In any case, there are times and places where that photocopy might not get you where you want to go. If you crave certainty, bring it along. And if you're ever headed for my area of the world. definitely bring all originals.

Hope that's helpful.

Mark