I've had the thought kicking around in my head for a while that the decentralized, difficult to alter nature of blockchain might have some use for the long-term

I've had the thought kicking around in my head for a while that the decentralized, difficult to alter nature of blockchain might have some use for the long-term preservation of provenance in the archival sense: Often figuring out whether something is legitimate or not requires tracking down its history of possession. This is/can be very messy, and I can see blockchain tech maybe eventually solving some of these issues. But preserving things for future researchers doesn't earn $$, so I imagine it will take a few decades at least.