DuckDuckgo has a feature where it shows the official URL of a piracy as the first result (screenshots below) it would be great if this was in Kagi, I'm not sure how they're doing that yet, but one way could be to use the URL from Wikipedia.
this would allow users to visit the official piracy websites, hence, protecting them from potentially malicious clones/imposters. 
Vlad said a year ago that Kagi will not get into the politics of copyright-infringing websites, which means they won't remove them, but I'd hope that would also mean not marking piracy sites as "official", which would be a clear endorsement of them.
Vlad by official sites I mean just that, there are alot of proxies and clones of popular piracy sites that could be unsafe, and search engines remove them (because of DMCA I guess) but not their clones, so the official site never comes up in search.
by queries/URLs I'm assuming you mean on duckduckgo ?
you just have to search the name of the site:
https://duckduckgo.com/?q=rarbg&hps=1&ia=web
https://duckduckgo.com/?q=1337x&ia=web
https://duckduckgo.com/?q=fmovies&ia=web
I don't think that Kagi role could be deciding what it's official, and what it's not; we've had some other discussions about similar issues, and I'd prefer Kagi to simply do a really hard work: offer me a list of results strongly related to my search, listed by priority or by others criteria (I'm not joking, this is a really hard work I think).
So, for me no special mark attached to results, for whatever reason.
(aside, my personal feeling is also that I wouldn't be comfortable using a search engine that cares particularly about piracy, that I don't approve at all...but it's only my point of view)
This does seem like a niche request. If any types of sites shoud have an 'offical' stamp it should probably be the sites of known companies, local government sites etc. We tried doing this in the early days of Kagi but it has proven to be hard than we thought - you can not really tell a site is official. Doing this just for piracy sites doesn't feel right - the users that use them have the tools in Kagi to filter out others and promote the ones they like via built in tools like Block and Prefer.
Vlad You can try the idea with less problematic and widely used website like sci-hub. they have many clones that try to trick people into donating to different crypto wallets than Alexandr's sci-hub one.
Currently the official mirrors are
sci-hub.ru
sci-hub.se
sci-hub.st
Anything else is third party and potentially a fraud attempt.
I'm not sure what do you mean by scaling here. But you can always rely on community to keep track of sci-hub or simply follow announcements by Alexandra on twitter. I can personally help with that as I usually help maintain new urls for sci-hub for many open source projects like zotero-scihub.
Also sci-hub keep track of offical mirrors here.
