Every claim on the transparency page can be checked against this code. The server is a single file with no dependencies. Read it. Check it. The entire site serves only these files and makes no requests to other websites.
This is the program that answers every request. Note that it logs no identifiers, sets no cookies, and makes no network calls out to anywhere else.
The complete list of questions. The server only ever accepts answers for the question ids listed here; anything else is thrown away.