If I give Obtainium this URL: https://builds.joinpeertube.org/mobile/peertube_mobile_v0.5.1.apk
…it recognizes that it’s an apk and shares with AppVerifier as I’ve configured obtainium to do. But I didn’t proceed further because I don’t want to install it if it’s not authenticl. I need a hash to compare with appveifier.
This is well beyond my skillset (or knowledge level), but something like ArchiveBox combined with ActivityPub might be able to distribute internet archiving, each instance sharing with the fediverse what it has archived.