[Glench]

That wouldn't make for a very useful global ledger :)

Once a farmer wins a block it's theirs, the same way it works with bitcoin. The reward is tied to a public key, not the original storage. Just like in bitcoin once a miner wins a block they don't need to continuously prove that they have x amount of hashing power in the future.

You can learn more about the details of the blockchain and algorithm here: https://www.chia.net/greenpaper/