How to Verify Age with Zero Knowledge Proofs Without Showing a Face: A Practical Walkthrough
https://mill-wiki.win/index.php/Why_Payment_Processors_Can%27t_Trust_Digital_Images_Alone_%E2%80%94_And_What_Actually_Works
I once bet a product manager that "verifying age without a photo" would be easy. I lost the bet, my sandwich, and three working weekends