I think overall the wikipedia model has shown itself to be decently working. But (anecdata) I have my gripes with the way it handles evidence. My SO has a person (died already) in her family with a (relatively) short wikipedia entry. There are factual errors in the article. We know that, because we have original documents showing that the "facts" reportet in the entry are wrong. Due to the fact that the documents can…
I have used this for license confirmations, not for fact checking, but they do Biographies of Living Persons work so they might be able to help.