Why not just store the hash of the most current state as a way to secure it? For the sake of data permanence, pertinent data could be a merkle tree held by the interested parties, culminating in the stored state on Bitcoin, and the proof of that data, such as address balance or even a large file, could be quite small, like 32kB for a 64-bit SHA-2 hashed tree (could fit in a single ping). The latest merkle top state could be stored on the most secure and globally consensual storage. A way to query network peers for updates to adjacent branches would be necessary, though.