There are a number of companies that are involved and more will join as the technology grows. As for more details on how it may work, I point to the following.

Cook County (IL) completed a pilot program. The report can be found at https://illinoisblockchain.tech/blockchain-cook-county-final-report-1f56ab3bf89

There are pilot programs being conducted now in Vermont. https://www.inman.com/2018/01/24/propy-launches-blockchain-pilot-in-vermont-to-record-real-estate-transfers/