V.systems (VSYS) Block Hash Algorithm

Hi,

Would like just to know what the Block Hash Algorithm does v.systems (VSYS) use? i.e. The algorithm used to generate the hash for its blocks particularly the Genesis Block

Example for this block: V SYSTEMS Explorer
What was used to generate the Block Hash: 3yYNd7quEWaWytrAug4yGwQvpL3PVJegf9d9NTv9PVE3ouBYJs5PTQqxCjd294uK1zPLj6G5Tk447LqFMWdSFvaQ?