The Factom blockchain (and company) is one of my favorite blockchain projects that has discussed operating as a land registry database/legal record.  I'm not sure if they've started using thier blockchain for this, but an idea was - In many countries in South America corrupt government officials will reassign private land owned by individuals to themselves.

They've changed the land registry's of farmers, and then taken their land. Frustratingly when the farmers challenge the impostors legal claim to the farmers land, the Courts unfortunately often rule in favor of the corrupt politician that has stolen land for themselves or often their extended family.

(At least when I read about the company some time ago-) Factom plans to operate as a 3rd party land registry system. That way Countries where land is confiscated and the courts/officials prove they can't be trusted, a third party system, like Factom, can provide a trusted independent land registry/records system.