I'm one of the Trustroots contributors, we have an old work-in-progress pull request to import couchsurfing data (https://github.com/Trustroots/trustroots/pull/1086), but it needs some love.

As mentioned in https://news.ycombinator.com/item?id=23219760 references is coming.

The verification issue though for import is a big one, we couldn't just trust a JSON file the user has uploaded to have real references, there would be nothing stopping them writing their own glowing references.