@Matt399 The host's reply sharing how the process works seems accurate based on what I've previously read on the forums (I don't rent my unit long term). With reviews rating back to 2015 would also give me a bit more piece of mind.
In the States, I would probably cross reference the host's name against the property tax records for that state to ensure he is indeed the owner of the property. Another option would be to call AirBnB and ask them about their verification process for hosts, and how you are financially protected if there is indeed an issue.
I wish you the best of luck!