Let's say I'm the buyer and this happens. There's now a record on the government blockchain that says I own a yacht. Does that mean I physically have possession

Let's say I'm the buyer and this happens. There's now a record on the government blockchain that says I own a yacht. Does that mean I physically have possession of the yacht now? How do we assure that what's in the blockchain is an accurate reflection of who actually has physical possession of the boat?