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Provably Fair Bitcoin Casinos

In the age of online Bitcoin casinos, players want more than fast withdrawals and peer to peer transactions. Players need to be able to trust their Bitcoin casino of choice. To earn this trust, dozens of Bitcoin casinos use provably fair algorithms to ensure the validity of each dice roll or turn of a card. Provably fair Bitcoin casinos are the safest place to gamble online and this page ranks the best provably fair Bitcoin casinos from the highest to lowest rated. Each of the casinos listed here feature their own impartial review written by one of our gambling experts. For those interested in how provably fair algorithms work, read on…

What is a provably fair random number generator?

A provably fair random number generator (RNG) is precisely what it sounds like. The mathematics that go into producing the randomness of your dice rolls or card shuffling can be proven to be fair – by you. Bitcoin casinos that choose to adopt a provably fair RNG will provide all of the various details to allow you to check – for yourself – that the roll was random.

Verifying a provably fair casino bet

First we will look at how to verify a casino dice roll. The terminology for doing so will appear confusing at first, however this will all be explained further in this article. We will use the popular Bitcoin casino, Bitsler for our demonstration.

1. Place a bet
provably fair casino bet
In this case we have made a 0.01 BTC wager with 49.5% odds.

2. View the bet
winning Bitcoin casino roll
By clicking on the bet ID we are able to see more information about our winning bet.

3. Click the “provably fair” tab
check provable fairness
This tab gives us the information that we need to prove that the dice roll was fair. This data is then copied and pasted into a verifier, such as DiceSites.com’s Bitsler Verifier. In Bitsler’s case, some additional information is found under “account > provably fair” which we will also need to use. Detailed instructions are provided by the verifier you choose.

4. Verify the casino bet
verified server seed
We can now see that our Bitcoin bet was valid. The verifier told us that they were able to generate a matching server seed (explained later). If the dice roll predicted by the verifier (36.11) matches the dice roll we made (36.11), then we know that our bet was truly random.

Once you are happy that a game is provably fair, you can then bet freely, knowing each roll has not been tampered with by the Bitcoin casino. For those who are interested in the technical side of provable fairness, read on.

How do provably fair casinos work?

This question is highly complex, and is difficult to answer in a single article. Further resources can be found at the bottom of this page. However, we will provide a fairly detailed introduction to provably fair Bitcoin betting. To first understand provable fairness, we need to take a brief look at hashing algorithms.

Hashing
A hash algorithm takes an input of data and outputs a string of seemingly random letters and numbers. Data of any size and length can be put into a hashing algorithm, and the output given is always the same length (the length depends on the hashing algorithm used). The most popular and most secure hashing algorithm today is SHA-256 (secure hashing algorithm – 256 bits). Let’s show a quick example of the output of a SHA-256 algorithm for 2 sets of data:

Input: provably fair
Output: ffc224677596698a2d257e6cd5e22ded461e6664d4fd4cd0f9ec297aaa387c51

Input: ProVabLy fair
Output: 67953c6366ac3c82d1f32cc9ff7a79951d4a41d9c188794c40f83be52e7b1f12

As you can see, the data input above have the same meaning. However, the data changes ever so slightly through the use of uppercase letters. This slight change in data leads to an enormous change in the output. Hashing algorithms are widely used for password security (you could not determine the input i.e. password from the output i.e. the hash) but they are also great for measuring changes to an input.

The relevance of the example above is to show the purpose of SHA-256 in a provably fair algorithm. If the output is at all different from what is expected from the input, then we know that the input (the random dice roll or random card shuffle) must have been manipulated!

Seeds
Bitcoin casinos that offer provably fair gambling will always provide a server seed and a client seed for you to verify. These seeds – combined with a nonce (an arbitrary number, typically the player’s bet number) – are all hashed together for validation. A verifier like the one above will look at the hashes of these combinations, and will match it against the expected hash. If the hashes match, then we know without doubt that the roll was fair and that no tampering with the randomness had occurred.

Provably fair Bitcoin casinos are changing our relationship with randomness, helping us to bet in safety without fear of rigging. A Bitcoin casino that offers provably fair validation is more secure (in its randomness) than any real-world or traditional online casino. For that reason, we always recommend that players consider provably fair betting sites ahead of any others. We have provided our list of the best provably fair Bitcoin casinos immediately below. Further reading on this topic can also be found in the list of links below.

Additional resources

Best Provably Fair Bitcoin Casinos

Use the filtering options on the left hand side to find the best provably fair casino for you.

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Bitcoin Sites Found

FortuneJack

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FortuneJack

Founded
2014

Casino

A well-known Bitcoin casino with great games and a fantastic loyalty bonus

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Betcoin

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Betcoin

Founded
2013

Casino, Dice, Poker, Sportsbook

If you're looking for a bitcoin poker site, then you've just found one of the best.

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Playamo

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Playamo

Founded
2016

Casino

Reliable Bitcoin casino that keeps the entertainment and cash coming

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Bitstarz

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Bitstarz

Founded
2014

Casino

One of the most professional and well produced casinos to ever accept Bitcoin.

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Oshi

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Oshi

Founded
Sep 2015

Casino

A casino with great games and some stunning bonuses

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MegaDice

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MegaDice

Founded
March 2017

Casino, Dice

The successor to the hugely popular SatoshiDice, and it lives up to the hype.

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BetChain

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BetChain

Founded
2014

Casino

A fantastic Bitcoin casino, with a brilliant selection of games and loads of great bonuses

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Nitrogen Sports

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Nitrogen Sports

Founded
2012

Casino, Dice, Poker, Sportsbook

One of the slickest, most comprehensive, Bitcoin sportsbooks around

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Joe Fortune

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Joe Fortune

Founded
2016

Casino

Bitcoin casino aimed at the Australian market

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Golden Star Casino

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Golden Star Casino

Founded
2012

Casino

Bitcoin casino with a strong selection of games and generous sign-up bonuses

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7Bit Casino

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7Bit Casino

Founded
2015

Casino

A new casino with a whole host of bonuses for new and existing players alike

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Bodog

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Bodog

Founded
1994

Casino, Poker, Sportsbook

Trusted online gambling site for Canadian market offering live bets on sports, poker and casino

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Loki Casino

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Loki Casino

Founded
2016

Casino

New Bitcoin casino site filled with big branded slots, table games and live casino action

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Stake

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Stake

Founded
August 2017

Casino

Fun-filled Bitcoin gambling at its very best.

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BitcoinCasino.us

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BitcoinCasino.us

Founded
2017

Casino

US-friendly Bitcoin casino with a massive welcome bonus and great games

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PropaWin Casino

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PropaWin Casino

Founded
2015

Casino

Bitcoin betting website with over 800 games from the world's top providers

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Mars Casino

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Mars Casino

Founded
2016

Casino

An intergalactic Bitcoin casino with much to offer players

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BetEast

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BetEast

Founded
2016

Casino, Sportsbook

Recently released Bitcoin sportsbook which is already on its way to being a big worldwide hit

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LimoPlay

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LimoPlay

Founded
2015

Casino

Great bonuses plus some fantastic games means Limoplay is a great place to play

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AdmiralSpot Casino

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AdmiralSpot Casino

Founded
2017

Casino

New provably fair Bitcoin casino with slots and table games

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CoinRoyale

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CoinRoyale

Founded
2013

Casino, Dice

A fantastic Bitcoin casino, with the added bonus of a decent dice game

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Slots.com

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Slots.com

Founded
2017

Casino

Brand new Bitcoin-only mobile casino

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Coin Palace

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Coin Palace

Founded
2015

Casino

Provably fair Bitcoin casino with the best progressive jackpot slots

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NASCasino

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NASCasino

Founded
2012

Casino

Great games and loads of bonuses make this the perfect Bitcoin casino for many

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777 Coin

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777 Coin

Founded
2013

Casino

A solid, provably fair Bitcoin casino with some exciting games

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Games.Bitcoin.com

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Games.Bitcoin.com

Founded
2016

Casino, Dice

The new face of Bitcoin gambling at Bitcoin.com

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Cakebet Casino

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Cakebet Casino

Founded
2014

Casino

Provably fair dice and blackjack casino compatible with any device

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King Billy

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King Billy

Founded
2017

Casino

Brand new Bitcoin casino with a great selection of games from the best software providers

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Crypto-Games.net

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Crypto-Games.net

Founded
May 2014

Casino, Dice

A simple, yet elegant Bitcoin gambling site with a big range of games

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Fun-Casino

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Fun-Casino

Founded
2014

Casino

A Bitcoin casino with great bonuses, but no live dealer games

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1xBit

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1xBit

Founded
2007

Casino, Forex, Sportsbook

1Xbit is a provably fair Bitcoin casino and Sportsook which provides a massive selection of games from dozens of software developers

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BetCoin.tm

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BetCoin.tm

Founded
2013

Casino, Poker, Sportsbook

Underneath the sloppy facade, you'll find a site offering a decect casino, sportsbook and poker

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Bitcoin Penguin

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Bitcoin Penguin

Founded
2014

Casino

Featuring some good games, but lacking the slickness and features of other Bitcoin casinos

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Lucky BTC Casino

Site Inactive

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Lucky BTC Casino

Founded
2015

Casino

A provably fair Bitcoin casino that accepts US-based players

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SmartRoulette.io

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SmartRoulette.io

Founded
March 2017

Casino

Unique ETH-based roulette wheel with dividend payouts

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DirectBet

Site Inactive

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DirectBet

Founded
December 2013

Casino, Sportsbook

A great Bitcoin sportsbook, offering some absolutely huge rewards

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