> Imagine that a mass-produced tech item from China came with a QR code certificate authenticity, which the end user could scan to check that the item had been

> Imagine that a mass-produced tech item from China came with a QR code certificate authenticity, which the end user could scan to check that the item had been made by a specific factory and a specific company. Nothing stops entities from entering false or unintentionally-incorrect information into the database. Honestly, all these supply-chain or authenticity tracking use-cases must have been dreamed up by people who have never worked a simple retail job in their life. If they had, they'd know databases tracking reality very easily (and inevitably) diverge from reality - the store inventory DB says you have two items in the back, but a half hour of searching confirms that is a lie. Stores even have a painful, labor-intensive process - called "taking inventory" - to fix the errors in the DB for a single physical store! Also, this concept is absolutely not unexplored. It's so popular that Bizonacci made a parody video about it, and several billion dollars of imaginary market cap are allocated to coins working on it.