> Proof of Authenticity
Authenticity how? That the user who created this has a nickname @grumpycat on foundation.app? What if I create a new such user on another platform, and sell that? Is it still authentic?
Is the domain actually-authentic-ntfs.com still available?
Edit: looks like it might be the same people that are running Twitter and Instagram accounts @RealGrumpyCat ... whether or not these are the original owners of the grumpy cat (according to Wikipedia), I've no idea.