I dont understand how to check if it is really provably fair.

1. How can I get the Server Seed Hash from the revealed Server Seed Plaintext ?

2. How is it related the Server Seed Hash with the associated BCC transactions ?
For example for 20th Oct:
Server Seed Hash: 601c19fa197d09b8d5d6a1ac1501a05d5be3a446c07ffc0e661a54844e511343  https://cashexplorer.bitcoin.com/tx/bda9abf9c82b14fd699dd98fa8e25cab4506b91b11132bea5fbd1c3b6f8ead5e
What is the relation between that hash and transaction ?

3. How can I get the lucky number with the Server Seed Plaintext, and Client transactionID ?