Another question, are stamps considered public domain or are stamps copyright to someone like a government? Are there any laws prohibiting the copying of stamps that require credit to be given? I just want to know if there are any legalities involved. My first gut feel was that stamps are like country flags, but I could be wrong.
Talking about the copyright, though, I wonder what law applies for selling those stamps as NFT, and whether this law applies equally on every country or there are several countries who didn't apply this law. I mean, what you do is basically "buy" an government issued "document" and "legit payment method" (stamp is what we pay to use postal service), digitalize them and re-sell them. Copyright-wise, is this counts as a fraudulent activity by creating fake "money"? Have you looked upon this issue and is there a supporting evidence that the action is not crossing any govts. law?