There was a question about libreoffice public pgp key, but there is no information about a fingerprint for that key.
Good question. Please contact the developers as one of them should know who signs the available dowloadable archives and what the public fingerprint is.
Well, perhaps this is the answer, but I don’t know who is Christian Lohmaier and why I should trust him and why I have to download mailing list archives and grep it to find a fingerprint for the public key. Eike Rathke already asked to add the fingerprint to the info pages a year ago, but there is still no answer.
C. Lohmaier is a well known member of the LO community: TDF blog post, FOSDEM 2016 presentation, and listed as Pootle (l10n) contact on the Find the expert wiki page. He is also user cloph on this site. Thanks for reporting back.