> Extension: wine. There is a live problem in China, with rubbish wine being fraudulently marked as premium Australian varieties. Each bottle could be chipped i

> Extension: wine. There is a live problem in China, with rubbish wine being fraudulently marked as premium Australian varieties. Each bottle could be chipped in the cap with an on-chain identifier. In the wine shop, you could use your phone to scan the identifier, and witness custody of that wine back to the producer. I'm not so sure it'll work well for items for consumption. There are several issues - At any point you can swap out the content of the wine (if you can re-cap it), and sell the genuine wine to someone who trusts the person doing the fraud. - You're somewhat dependent on many people actually scanning the bottle. You can duplicate a bottle, and if someone doesn't scan it, it's not detected. If you've managed to insert yourself in the supply chain and only care about milking it for profit until you're detected and then running away with the money, you might get away with it for a while. - I know of at least one liquor from China that marks each bottle with an ID that you can check. It achieves much of the same benefit without blockchain if the supply chain isn't very long and complex I also don't think PoW or PoS makes any sense with these use-cases where you track items or handle logistics. You probably want some organization setting standards for auditors, and to handle necessary changes to the blockchain algorithm and such. So might as well be proof-of-authority.