If you wanted to transfer real property in England a thousand years ago, you would have to publicly present the buyer with a clod of dirt from the land, symbolizing the transfer of title, and record the exchange in the local shire-book or church-book. One thousand years later and the clod is gone, but the rest of the process is very much the same: transfers of real property are still recorded with the local county's recorder of deeds, the modern equivalent of the shire-book. It's an effective, but not a terribly efficient, system.
Blockchain technology, some propose, can bring that antiquated system into the contemporary age. Blockchain technology could create a widely distributed, indecently verifiable, and largely incorruptible record of property ownership that bypasses the centralized system of county offices and recorders of deeds, or so the thinking goes. It's as though everyone could have their own personal, inscrutable Domesday Book.