Creation of the first Bitcoin which was 50btc was achieved due to mining. The creation was the first block of it kind which is usually called Genesis block or in other way block 0.

Yes the creation is by mined by means of hashing algorithm but there is a difference in Bitcoin mining which is *it only contain one transaction*

From my understanding once the block in the process of mining is successful it's hash is going to hardcoded into the Bitcoin clients source code. This was how namamoto created the first block and the chain begins and continue till now.