Ask HN: Any examples of blockchain-like industry ledgers being used IRL?

On another thread I was pontificating wildly with very little evidence - and realised that the evidence would actually be nteresting. So - industries world wide are "supposed" to start moving their supply chain data onto blockchain like ledgers - ie when you have finished sewing a dress, or glazing a pot, you upload the data using your company private key, to a ledger, and then downstream companies can start to print out customs documents or making room on shelves etc. But I honestly have not heard of any successful examples. Does HN know of any good ones?