@Freyja@ploum I don't know about other TLDs, but I've held several .fr for a few years now, and the WHOIS informations has always looked something like this:
@Freyja@ploum Only service I found that seems to have historical data about that domain is DomainIQ, but I don't have a subscription, so I can't check exactly what they have archived. Maybe you'll be able to find something interesting ;-)
Gregory's Server
@Freeben @ploum give me one, if the whois data ever showed clear data then masked I will be able to find them