We’re entering a world where AI – including AI agents, bots, deep fakes, and so on -- are changing the internet, very drastically. And so we will need proof of who’s human, or not, online – aka “proof of human". (This theme is also represented on the latest cover of Time magazine). Since the technology -- and network -- story here draws on both existing and new tech to help solve what’s actually a *very* difficult problem, we cover why it matters, go into some common questions, and finally how it all works under the hood.