Now I think I'm starting to understand. Vet sells me a bottle of amoxicillin. I don't use it before its use-by, so I stick it in the correct waste bin, all taken away by the approved waste contractor. All recorded on a blockchain, so it definitely happened like that.You get it at least !
Less physical inspections also equals less time wasted and less inspectors which all saved money
Except there's no actual proof that it wasn't used. No one is measuring the bit left in the bottle. You've got an incorruptible record of - potentially - garbage. Just like the current electronic medicine book.
Dad was accused of lying by the latest RT auditor because the med usage was so low. Almost got a non conformance which, presumably, would have been quite a serious one. Except dad has done nothing worse than minimise his AB usage. And recorded it diligently.
Blockchain doesn't actually change anything there.