Personally, I think there are a number of hard questions to answer surrounding fact checking, it might be wise to get advice from experienced people in fact checking (I have no idea what it is called, but I think that is an entire field).
No big deal, but it raises my curiosity, why are you located in Canada and incorporated in the U.K.? I see you already have a LTD, and TOS (so you _did_ speak to legal advice already, I guess?) It seems like you have gone pretty far with this already. It seems I can get a quote as a business... do you charge by the query?