Interestingly enough, I see that Bitfury, have already rolled out a system which is in use today in conjunction with the gubermint of Georgia which does use BTC in a fashion for real estate registry. (It uses a private permissioned blockchain to collect all the data and execute the tx, and then publishes it to the Bitcoin blockchain for public verification)

So far has 300,000 properties supposedly recorded in this fashion.

"NAPR (which is charged with land registry in Georgia)  was able to provide Georgian citizens with digital certificates of their assets supported with a cryptographic proof (known as a hash). This hash was published to the Bitcoin Blockchain. This enabled the owner of the document to prove their legitimate ownership of the property by showing their timestamp. No one can alter the timestamp on the Bitcoin Blockchain, including NAPR.

Integrating this layer meant that information about a property title could not be altered, and that any attempted tampering would be equivalent to tampering with the Bitcoin Blockchain (making it publicly visible to everyone on the Bitcoin network)"