I think the idea is to time lock a utxo for a certain block height long into the future using a vault like op code. Then you broadcast the private key. Whichever miner finds that block will be able to spend that utxo to themselves.
Discussion
So they would create the spend transaction which shows the UTXO (that everybody has access to) being sent to their account/address. Such that when the block is mined, the spend was already included.
Makes sense. Thx for explaining.
I love the idea.