Basically, when I load up your ship, I document all the stuff I am loading on to the ship in a Bill of Lading. You agree that all of that stuff is present and y

Basically, when I load up your ship, I document all the stuff I am loading on to the ship in a Bill of Lading. You agree that all of that stuff is present and you're now responsible for it. At the other end of the shipping route you present the Bill of Lading and show that all the goods are present and intact. If this document is digital, then I might get screwed if you lose stuff or stuff gets damaged and you remove it from the Bill of Lading and say you never saw the goods. Or you might get screwed if I add new stuff to the Bill of Lading after you load the goods and claim you didn't deliver it. So one way to solve this is to put the document and both of our signatures in a blockchain, and now we all agree that this is what we saw on that date.