BITCOIN 101: WHAT IS A FORK AND HOW DOES IT WORK?

Last updated: June 19, 2025, 20:31 | Written by: Brian Kelly

Bitcoin 101: What Is A Fork And How Does It Work?
Bitcoin 101: What Is A Fork And How Does It Work?

Imagine Bitcoin as a highway, perfectly designed to transport digital value from one place to another. What exactly is a Bitcoin fork? Why does it happen? And what are the results? This article will answer these questions and provide historical examples of previous Bitcoin forks. It will also outline the implications of a fork and what you need to do when the next one occurs.Now, what happens when some users and developers disagree about the rules of the road, like the speed limit or the number of lanes? While the responses to Is ZCash better than Bitcoin? refer to privacy, it is important to note that ZCash is a Bitcoin fork. Therefore, ZCash has many similarities with Bitcoin. For example, the total supply of ZCash is fixed at 21 million units like Bitcoin. Want to become a bitcoin expert? Enroll Now: Getting Started with BitcoinThey might decide to create a new highway, branching off from the original. Examples of Bitcoin Hard Forks. Bitcoin hard forks work in the same way that a regular hard fork does. Typically, these hard forks have been proposed to improve on Bitcoin's limited 1MB block size, with the intention of improving transaction speeds. Below are some examples of the first Bitcoin hard forks: 1/ Bitcoin XTThis, in essence, is what a Bitcoin fork is. How Does Bitcoin Work? Unlike physical currency, Bitcoin does not have a central bank fund. Bitcoin Cash is a 2025 Bitcoin fork that attempted to make transactions faster and cheaper throughIt's a split in the Bitcoin network, a divergence in the blockchain's transaction history that leads to the creation of two or more distinct paths. This is one of the extremely rare instances of any fork having a positive impact on the Bitcoin network itself. Why Do So Many Bitcoin Forks Fail? Reading all of this, you might be surprised that virtually every Bitcoin hard fork has failed to gain any significant level of success, but there are a few reasons why this is the case.This can lead to new cryptocurrencies being born, which existing Bitcoin holders can often claim, like receiving shares in a company that spins off a new entity. For instance, when the Bitcoin blockchain split into two, Bitcoin Cash was created. The changes that happen during a hard fork are permanent and not backward compatible meaning that all nodes must be upgraded because the old version of the software will not work with the new one.This comprehensive guide will explain in detail what Bitcoin forks are, why they happen, and what implications they hold for you as a Bitcoin user or investor. The Bitcoin story of the summer has been about the future direction of Bitcoin in relation to block size and a potential Bitcoin fork. 899 Bitcoin XT Users Allegedly Suffering Coordinated Hack AttackWe'll explore different types of forks, examine historical examples, and outline what you need to know when the next Bitcoin fork inevitably occurs.So, buckle up, and let's delve into the fascinating world of Bitcoin forks!

Understanding the Definition and Functioning of a Bitcoin Fork

In the context of the Bitcoin blockchain, a fork represents a change or upgrade in the Bitcoin protocol or software. Welcome to my first cryptocurrency video series! To start, we begin with the fundamentals.Blog Post: Mention forThink of it as a software update that takes an interesting turn.Instead of everyone just downloading the update and continuing as normal, a portion of the community decides to go their own way, creating a separate blockchain with the new rules.This detachment can be driven by a desire for modifications, whether minor tweaks or major overhauls, and can even be aimed at resolving a fundamental disagreement within the community.

What Triggers a Bitcoin Fork?

A fork occurs when a part of the Bitcoin community decides to detach from the original chain to create a new chain with different rules. What is a Soft Fork? A soft fork is a more subtle change. It updates the blockchain without breaking compatibility with older software. This means even if some nodes don t upgrade, they canThis typically happens because of disagreements on:

  • Block size limits: How much data can be included in each block on the blockchain.
  • Transaction speeds: How quickly transactions are processed.
  • Consensus mechanisms: How transactions are validated and added to the blockchain.
  • New features and functionalities: Introducing new capabilities to the Bitcoin network.

These disagreements can lead to different factions within the Bitcoin community, each with its own vision for the future of the cryptocurrency.When these differences are irreconcilable, a fork may be the only solution.

Soft Forks vs.Hard Forks: What's the Difference?

Bitcoin forks aren't all created equal.They can be broadly categorized into two main types: soft forks and hard forks.Understanding the distinction between these two is crucial for comprehending the implications of a fork on the Bitcoin network.

Soft Forks: Backward-Compatible Changes

A soft fork is a more subtle change to the Bitcoin protocol. Leader in cryptocurrency, Bitcoin, Ethereum, XRP, blockchain, DeFi, digital finance and Web 3.0 news with analysis, video and live price updates. What Are Crypto OTC Desks And How Do They WorkIt updates the blockchain in a way that remains compatible with older software. Bitcoin For Dummies: What Is Bitcoin And How Does It Work? BTC or Bitcoin is a kind of digital money that exists on its own independent network. The network is known for facilitating online transactions safely and directly between accounts without needing an intermediary.This means that even if some nodes (computers running the Bitcoin software) don't upgrade to the new version, they can still participate in the network and recognize the validity of the new blocks. Bitcoin Cash was the result of some users and developers preference to avoid the changes proposed by SegWit. It split away from the main blockchain in 2025 and ultimately became the most successful hard fork on record. Bitcoin Gold. Not long after Bitcoin Cash split away, Bitcoin Gold entered the landscape.Essentially, a soft fork narrows the rules of Bitcoin, making previously valid transactions invalid unless they meet the new, stricter criteria.This forces non-upgraded nodes to accept the new rules even if they don't fully understand them.A good analogy is reducing the size of a doorway. The first hard fork splitting bitcoin happened on, resulting in the creation of Bitcoin Cash. The following is a list of notable hard forks splitting bitcoin by date and/or block: Bitcoin Cash : Forked at block ,, for each bitcoin (BTC), an owner got 1 Bitcoin Cash (BCH)Even if you're still using the old-sized door, you can still pass through the smaller doorway.

  • Backward Compatibility: Older nodes can still process transactions under the new rules.
  • Consensus: Requires a high percentage of miners to adopt the new rules.
  • Risk: Relatively low risk, as it doesn't create a new blockchain.

Hard Forks: Non-Backward-Compatible Changes

A hard fork, on the other hand, is a more radical change.It introduces new rules that are not backward-compatible.This means that nodes running the old software will not recognize the new blocks as valid, and they will be effectively separated from the upgraded network. A Bitcoin fork refers to a change or upgrade in the Bitcoin protocol or software. It can result in either a soft fork (backward-compatible changes) or a hard fork (non-backward-compatible changes), potentially creating two separate versions of the Bitcoin blockchain.A hard fork essentially creates two separate versions of the Bitcoin blockchain, each with its own set of rules and its own community.The original chain continues, but a new chain is born alongside it.Think of it as splitting that highway we mentioned earlier into two completely different roads, each with its own destination.

  • Non-Backward Compatibility: Older nodes cannot process transactions under the new rules.
  • Consensus: Requires a clear majority of the community to support the change.
  • Risk: Higher risk, as it can lead to network fragmentation and the creation of competing cryptocurrencies.

The key difference lies in compatibility.Soft forks are like a gentle nudge in a new direction, while hard forks are a complete split, creating a new cryptocurrency.Therefore, the changes that happen during a hard fork are permanent and not backward compatible meaning that all nodes must be upgraded because the old version of the software will not work with the new one.

Why Do Bitcoin Forks Happen?

The reasons behind Bitcoin forks are varied, but they generally stem from disagreements within the community regarding the future direction of the cryptocurrency. Bring your knife and fork, and let's dig in. What is a blockchain fork? A blockchain fork is a divergence in a blockchain's transaction history, leading to the creation of two distinct paths. A fork occurs when consensus rules are altered, resulting in a split between nodes, miners, and users, often facilitating protocol upgrades or resolvingHere are some common motivations:

  • Scaling Issues: The original Bitcoin protocol had a limited block size of 1MB, which could lead to slow transaction times and high fees, especially during periods of high network activity.Some forks, like Bitcoin Cash, aimed to address this by increasing the block size.
  • Protocol Improvements: Forks can be used to implement new features or improvements to the Bitcoin protocol, such as enhanced privacy features or more efficient transaction processing.
  • Ideological Differences: Sometimes, forks are driven by fundamental disagreements about the philosophy of Bitcoin and its intended use case.For example, some developers might believe that Bitcoin should primarily be a store of value, while others might prioritize its use as a medium of exchange.
  • Addressing Perceived Flaws: Forks can also be used to correct perceived flaws in the original Bitcoin protocol, such as vulnerabilities or inefficiencies.

Examples of Bitcoin Hard Forks: A Historical Perspective

Several notable hard forks have occurred in the history of Bitcoin, each with its own motivations and outcomes. A Bitcoin Fork is a term describing a split in the Bitcoin network. A fork can result in the creation of new coins that can be claimed by existing Bitcoin owners. In this post I ll explain in detail what Bitcoin forks are, what risks they entail, and how to claim coins generated from forks safely.Examining these examples can provide valuable insights into the dynamics of Bitcoin forks and their impact on the cryptocurrency ecosystem.

Bitcoin Cash (BCH): A Response to Scaling Concerns

Bitcoin Cash (BCH), forked from Bitcoin at block 478,558, is perhaps the most well-known example of a Bitcoin hard fork. What is Bitcoin Fork? A bitcoin fork is a split of the bitcoin network. This happens when the bitcoin network doesn t agree on the rules that should govern the bitcoin network.It was created in August 2025 as a direct response to the perceived limitations of Bitcoin's 1MB block size.The Bitcoin Cash fork initially changed the block size limit from 1 to 8 MB and later to 32 MB, with the intention of improving transaction speeds and lowering fees.For each bitcoin (BTC) an owner got 1 Bitcoin Cash (BCH).

The creation of Bitcoin Cash sparked a significant debate within the Bitcoin community, and it continues to be a subject of ongoing discussion. Check out our definitive guide: What is Bitcoin and how does it work? A fork, in the context of blockchain and cryptocurrencies, can be visualized as a split in the road. It's an avenue by which the original code of a cryptocurrency can branch off, leading to two potential paths.While it has achieved some level of success, it hasn't surpassed Bitcoin in terms of market capitalization or adoption.

Bitcoin Gold (BTG): A Focus on Decentralization

Not long after Bitcoin Cash, Bitcoin Gold (BTG) entered the landscape.Bitcoin Gold aimed to address concerns about the centralization of Bitcoin mining by implementing a different mining algorithm that was less susceptible to specialized mining hardware (ASICs).The goal was to make mining more accessible to ordinary users, thereby promoting greater decentralization.

Bitcoin Gold, however, has faced its own challenges, including security vulnerabilities and limited adoption.

Bitcoin XT: An Early Attempt at Increasing Block Size

Bitcoin XT was among the first Bitcoin hard forks. A Cryptocurrency Mixer also known as a crypto tumbler or Bitcoin mixer is a service designed to obscure the origin and destination of digital assets. It works by pooling cryptocurrencies from multiple users, mixing them together, and then redistributing the funds to new wallet addresses.The large adoption and public support of Bitcoin XT came in mid 2025 when Gavin Andreesen, one of the first developers working on bitcoin core with Satoshi, proposed BIP 101 amid the increasing attention and transaction volume of bitcoin core in 2025. An example is Bitcoin Cash, which forked from Bitcoin in August 2025. The Bitcoin Cash fork changed the block size limit from 1 to 8 MB and later to 32 MB. Another example of a hard fork is Ethereum Classic. This was created in October 2025, when a group of developers rejected new rules that were implemented with a hard fork.BIP 101 proposed a block size increase from 1 8 MB, and then steadily increase thereafter.

What Happens After a Bitcoin Fork?

Following a Bitcoin fork, several things can happen, both for the Bitcoin network and for individual users:

  • Creation of New Coins: In the case of a hard fork, a new cryptocurrency is created.Existing Bitcoin holders typically receive an equivalent amount of the new coin, often referred to as an ""airdrop."" For example, if you held 1 BTC at the time of the Bitcoin Cash fork, you would have received 1 BCH.
  • Price Volatility: Forks can often lead to increased price volatility for both Bitcoin and the newly forked coin.This is due to uncertainty and speculation surrounding the event.
  • Network Fragmentation: Hard forks can fragment the Bitcoin network, as different nodes and users choose to support different versions of the blockchain.
  • Competition for Adoption: The original Bitcoin and the forked coin will compete for adoption and usage.The success of each chain will depend on factors such as community support, developer activity, and network security.

Navigating Bitcoin Forks: What You Need to Know

Bitcoin forks can be complex and potentially confusing, but understanding a few key principles can help you navigate them safely and effectively:

  1. Stay Informed: Keep up-to-date on the latest developments in the Bitcoin community, including any proposals for upcoming forks. The large adoption and public support of Bitcoin XT came in mid 2025 when Gavin Andreesen, one of the first developers working on bitcoin core with Satoshi, proposed BIP 101 amid the increasing attention and transaction volume of bitcoin core in 2025. BIP 101 proposed a block size increase from 1 8 MB, and then steadily increase thereafterReputable cryptocurrency news sources and Bitcoin forums are good places to start.
  2. Do Your Research: Before making any decisions about supporting a particular fork or claiming new coins, thoroughly research the project.Understand its goals, its technology, and the team behind it.
  3. Secure Your Private Keys: Ensure that you have control over your Bitcoin private keys. 2) Do Your Research. Before you buy Bitcoin or any cryptocurrency, for that matter do your research. Learning the basics about Bitcoin is a good start, but delving deeper into the cryptocurrency market will strengthen your position once you do decide to buy. However, just researching Bitcoin isn t always enough.This is essential for claiming any new coins that may be created as a result of a fork. Bitcoin Explained: What Is It How Does It Work? 💰Storing your Bitcoin on a hardware wallet is generally considered the most secure option.
  4. Exercise Caution: Be wary of scams and phishing attempts that may arise in the wake of a fork.Always verify the legitimacy of any claims or offers before taking action.
  5. Consider the Risks: Understand the risks associated with supporting a particular fork, including the potential for price volatility and network fragmentation.

Claiming Coins from a Bitcoin Fork: A Step-by-Step Guide

If you held Bitcoin at the time of a hard fork, you may be entitled to claim an equivalent amount of the newly created coin. Bitcoin 149 What Are Bitcoins? 150 What Is the Point of Bitcoin? 151 How Does Bitcoin Work? 153 Bitcoin s Ecosystem 194 Bitcoin in Practice 194 Bitcoin s Predecessors 201 Bitcoin s Early History 207 Bitcoin s Price 224 Storing Bitcoins 229 Software Wallets 230 Hardware Wallets 236 Buying and Selling Bitcoins 240 Exchanges 240The process for claiming these coins can vary depending on the specific fork and the wallet you are using, but here are some general steps:

  1. Find a Compatible Wallet: Choose a wallet that supports the new coin and allows you to import your Bitcoin private keys. Today, bitcoin cryptocurrency is mainly used as a store of value, kind of like digital gold. Relative to other blockchains, bitcoin is quite expensive to use as an everyday payment system. 📚 Read! Bitcoin is a Legit Store of Value. Here s Why. What is Ethereum and How Does It Work? Bitcoin is not Turing-complete.Some wallets may offer a built-in claiming tool, while others may require you to use a separate application.
  2. Import Your Private Keys: Import your Bitcoin private keys into the compatible wallet. The live Bitcoin price today is $104,364.35 USD with a 24-hour trading volume of $50,255,072,425.45 USD. We update our BTC to USD price in real-time.This will allow you to access the new coins that are associated with your Bitcoin address. Be extremely cautious when importing your private keys, as this can expose your Bitcoin to risk if the wallet is not secure.
  3. Follow the Claiming Instructions: Follow the specific instructions provided by the wallet or the fork's developers for claiming your coins.This may involve signing a transaction or performing other actions.
  4. Verify Your Balance: Once you have claimed your coins, verify that they are showing up in your wallet.

Important Note: Claiming coins from a fork can be technically challenging and potentially risky.If you are not comfortable with the process, it is best to seek assistance from a trusted expert.

Why Do So Many Bitcoin Forks Fail to Gain Traction?

While Bitcoin forks can be exciting and potentially lucrative, it's important to recognize that the vast majority of them fail to gain significant traction or long-term success.There are several reasons for this:

  • Lack of Community Support: A fork is only as strong as the community that supports it.If a fork lacks widespread support from developers, users, and businesses, it is unlikely to succeed.
  • Limited Use Cases: Many forks offer little or no real improvement over Bitcoin, or they address niche problems that don't resonate with a broad audience.
  • Network Effects: Bitcoin benefits from strong network effects, meaning that its value increases as more people use it. Definition and functioning of a Bitcoin fork What is a fork in the context of the Bitcoin blockchain? A fork occurs when a part of the community decides to detach from the original chain to create a new chain with different rules. This detachment can lead to minor or major modifications. Additionally, it can be done to resolve aIt's difficult for new forks to compete with Bitcoin's established network.
  • Marketing and Awareness: Successfully launching a new cryptocurrency requires effective marketing and awareness campaigns.Many forks fail to generate sufficient buzz to attract new users.
  • Security Concerns: New blockchains can be vulnerable to attacks, especially in their early stages.A successful attack can severely damage the reputation of a fork and deter potential users.

Bitcoin Forks and the Future of Cryptocurrency

Bitcoin forks are an inherent part of the cryptocurrency ecosystem.They represent a mechanism for innovation, experimentation, and adaptation. Two chains or more can be formed, depending on how large the factions are that disagree. The same transactions that normally would go into one block in the chain can divide into two or more blocksWhile many forks may fail to achieve lasting success, they can also lead to valuable insights and improvements that benefit the entire cryptocurrency space.

As the cryptocurrency industry continues to evolve, we can expect to see more Bitcoin forks in the future.Whether these forks will ultimately succeed or fail remains to be seen, but they will undoubtedly continue to shape the trajectory of Bitcoin and the broader cryptocurrency landscape.

Beyond Bitcoin: Forks in Other Cryptocurrencies

It's important to note that forks aren't unique to Bitcoin.They're a common phenomenon in the wider world of cryptocurrencies.Many other blockchains, such as Ethereum, have also experienced forks, often driven by similar motivations: protocol upgrades, scaling solutions, or ideological disagreements.Ethereum Classic is an example, created in October 2025, when a group of developers rejected new rules that were implemented with a hard fork.

Understanding the concept of forks in Bitcoin provides a valuable framework for understanding forks in other cryptocurrencies as well.

Conclusion: Key Takeaways on Bitcoin Forks

Bitcoin forks are a complex but essential aspect of the cryptocurrency landscape.They represent a way for the Bitcoin community to evolve and adapt to changing needs and priorities.Whether you're a seasoned Bitcoin investor or a newcomer to the world of cryptocurrency, understanding what forks are, how they work, and what implications they hold is crucial for navigating this dynamic and ever-changing space.Remember to stay informed, do your research, and always prioritize the security of your private keys.Bitcoin's journey is constantly being written, and forks are an integral part of its narrative.Ultimately, Bitcoin forks will continue to shape the development of Bitcoin and the wider cryptocurrency ecosystem.So, stay informed, stay vigilant, and continue learning!

Brian Kelly can be reached at [email protected].

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