Probably not quite what you're after, but LOCKSS (Lots of Copies Keeps Stuff Safe) is pretty good, and is actively used. https://www.lockss.org/ https://www.lo

Probably not quite what you're after, but LOCKSS (Lots of Copies Keeps Stuff Safe) is pretty good, and is actively used. https://www.lockss.org/ https://www.lockss.org/