Is the Guinness Book of World Records legitimate?

Context: Guinness World Records, known from its inception in 1955 until 1999 as The Guinness Book of Records and in previous United States editions as The Guinness Book of World Records, is a reference book published annually, listing world records both of human achievements and the extremes of the natural world. The brainchild of Sir Hugh Beaver, the book was co-founded by twin brothers Norris and Ross McWhirter in Fleet Street, London, in August 1955.

Answer: According to the text, the Guinness Book of World Records is a real organization that was started in 1955. The organization certifies world records by sending an official certifier to witness and record world records.