I've been doing a similar thing in between projects - digitizing a ton of archival live recordings and getting them to the artists via WeTransfer.
The only reason I'm starting there instead of just posting them publicly is that - especially during the past couple of years - it seems more artists have decided to give more consideration to releasing material through their own official channels, which may actually provide a small means of support for them.
This way, they can vet the recordings, and either sign off on allowing them out into the wild, or select tracks that can be released officially.
The funny thing is, that back in the day, I tried to provide the artists with either safety copies or secondary masters, for pretty much the same reason, and most artists either lost the tapes or decided that live recordings weren't worth doing anything with on an official level. For some, that attitude at least has changed now, thankfully.