If it's on Hive there's only one copy, whatever the Hive witness say is the copy. As Hive continues to centralize around the few people interested in continuing to buy it (it's dPos after all) eventually you're down to nothing different than a single VPS hosting because it's already to a point where Blocktrades controls the chain for all intents and purposes. (tl:dr Hive isn't distributed now and is only getting worse)

If it was on a nostr relay that was hosted by Podcast Index then everyone would likely just sub to PI for their updates. If you did want to keep your own copy for some reason (maybe you want to backup PI and keep them sound) you could just sync those events to your own relay for safe keeping.