I found a BTC hash. Now what?
If you have found a new valid block at the network's chaintip, then you should submit that block to your network peers as soon as possible, so that they will hopefully add it to their local blockchain record. If other miners build upon your block, then it should become a part of the valid chain, and you will eventually be able to spend the coinbase UTXO in it (after it has matured 100 blocks).
As an example, if you are running bitcoin-core then you can use the submitblock command to submit your valid block to the network.