Yeah! That's obvious. Since we are hashing same number again and again and we have final hash with us, we can easily check if correct server seed is used by hashing server seed of the round times the number of rounds played so far. It has to be same with the final hash, no rocket science in that. But verifying server seed alone doesn't guarantee that result is correct. One has to calculate final result by following all steps and match with the card shown to make sure casino doesn't play any dirty in later calculation.

I've known to checking each of our manual bets that we place on a dice site, but still not aware of checking the fairness of autobet rolls. Let's take an example of duckdice, if I play through their autobet feature and use flash in it, I won't be able to check each and every dice bet that it places. And I mostly lose on those flash bets, does it mean that the site is rigged? But what about the fact that I win sometimes when I manually play there?

I suppose you are not the only one. I think the majority here did not think about it before the appearance of this topic, or rather, they thought about it, but no further action occurred.
Now this is already a question of interest, because in fact this is collective interaction at the forum. I will definitely check my next bet.

If the gambling site provide a feature that is integrating a plugin from a third party where you can quickly check your server seed and client seed that will be a great addition to a gambling site's legitimacy in my opinion in fact it will be a good investment and it will generate more customers wanting to play their site.

Provably Fair Script is one of the basic element of online gambling, especially for crypto based casinos. However, most of the gamblers don't give dime about it while some don't even know what is it and how it operates. I started crypto gambling in 2016 and didn't know about Provably Fair for most of my initial gambling days. But believe me in the absence of Provably Fair, you are not gambling, you are just being cheated by the house.

The basic idea of this thread is to share my views on PF script and how to make most out of it. I have spent few weeks developing unique logic for Provably Fair script for upcoming gambling site clubbing it with blockchain technology. While developing it, I visited around 20 casinos and tried their PF script to understand current practice. However, this thread is not about my script but about current practice.

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Now coming to the most important part. Probably this part is the main reason why I created this thread. Although, the above system is foolproof but site owners can easily fool you if you ain't paying enough attention. So here are the few points you should consider while gambling:

(i) Always copy server seed hash shown to you before betting.
(ii) After bet is complete, create new client seed. Make sure server seed is also changed along with it.
(iii) Once new client seed is created, site will show you unhashed server seed of previous bet. Copy it and convert it to sha256 hash using some third party online tool.
(iv) Match the server seed hash that you copied in step (i) to the one generated in step (iii) and make sure both are exactly same.

Two days ago, I tested my code with few people. I shown them different server seed hash before bet and after bet I kept first 6 characters same, last 3 characters same and few similar characters in the middle. It took just 30-40 seconds for my machine to generate such hash. With more powerful machine, I can speed up the process and create more matching characters. To my surprise, none of the tester noticed that they were shown different server hash before and after bet. It is human tendency that they only consider few letters (probably starting and ending ones) when presented random word like hexadecimal hash. So with bare eyes, no one was able to notice the difference. So be safe and make sure you verify every bet you make. Being a coding enthusiast, I can assure you that it is very much possible that house can easily manipulate results without player even noticing.

Another thing you can do is to use cross-casinos verification. For example, Fortunejack and Bitsler use same script, you can verify your fortunejack bets using bitsler's verification script.