AI-generated images, audio, and video are only going to get better, eventually making it impossible to distinguish from pre-AI content. It’s not too late to prove the authenticity of pre-AI content, but it seems that this window is closing rapidly. Are there any efforts to record PoE (Proof of Existence) records with centralized or decentralized services? A centralized service could store and serve an HMACs (timestamp + content hash) of anonymous uploads. A decentralized service (like blockchain) can also store content hashes along with transaction time. I would have expected one of these services to gain popularity as AI generated content is increasing, but this doesn’t seem to be the case, and I’m wondering what the reason could be.