The cryptocurrency world is no stranger to change, and one of the most significant shifts in Bitcoin’s history occurred on August 1st, 2017 — the hard fork that gave rise to Bitcoin Cash (BCH). This event created a new digital asset while maintaining the transaction history of Bitcoin up to the point of the split. For users of secure hardware wallets like TREZOR, this chain-split brought both opportunity and complexity.
If you're a TREZOR owner holding Bitcoin at the time of the fork, you likely gained an equal amount of Bitcoin Cash. But what exactly does that mean? How can you access those coins safely? And what precautions should you take?
Let’s break it down step by step.
Understanding the Bitcoin Cash Hard Fork
On August 1st, 2017, a segment of the Bitcoin community executed a non-backward-compatible upgrade — commonly known as a hard fork — to increase the block size limit from 1MB to 8MB and remove Segregated Witness (SegWit). This change led to the creation of a new blockchain: Bitcoin Cash (BCH).
Because this was a chain-split, every holder of Bitcoin prior to the fork automatically became a holder of an equal amount of Bitcoin Cash. However, these two assets are now entirely independent — meaning transactions on one chain do not affect the other.
Your private keys control both sides of the split — but only if you held your Bitcoin in a self-custody wallet like TREZOR before the fork.
Many exchanges and custodial services did not support the fork initially, leaving users unable to claim their BCH. With TREZOR, however, you retain full control over your funds — no third party can block your access.
👉 Discover how to securely manage multiple cryptocurrencies after a hard fork
Do You Need to Take Action?
Short answer: Only if you want to use or transfer your Bitcoin Cash.
If you don’t plan to interact with Bitcoin Cash, no action is required. Your original Bitcoin remains safe and unaffected on the main Bitcoin chain.
However, if you wish to claim your BCH, you must go through a claiming process within the TREZOR ecosystem. This ensures your newly acquired coins are moved from your legacy Bitcoin address to a dedicated Bitcoin Cash address.
This separation enhances security and prevents accidental misuse of funds across incompatible networks.
How to Claim Your Bitcoin Cash (BCH) Using TREZOR
TREZOR has implemented full support for Bitcoin Cash, including protection against replay attacks and a user-friendly claiming interface.
Here’s how it works:
- Open TREZOR Wallet (now known as Trezor Suite).
- In the currency selector, choose Bitcoin Cash (BCH).
- You’ll be prompted through a secure process to claim your coins.
- The system will generate a new BCH address using the BIP44 derivation path:
m/44'/145'/ - Your BCH will be sent from your old BTC address to this new, chain-specific address.
Once completed, you can send, receive, and manage your Bitcoin Cash independently — just like any other supported cryptocurrency.
✅ Important: Always ensure you’re using official TREZOR software. Never enter your recovery seed on third-party sites.
Address Format and Derivation: Why It Matters
One common misconception is that Bitcoin and Bitcoin Cash share the same addresses. They don’t — at least not in practice.
While both use the same seed phrase for key generation, Bitcoin Cash uses a different derivation path:
m/44'/145'/This means your BCH addresses are unique to that network and should never be used for Bitcoin transactions — and vice versa.
Sending BTC to a BCH address (or BCH to a BTC address) without proper cross-chain support could result in permanent loss of funds. Always double-check the receiving currency before confirming any transfer.
Replay Protection: Keeping Your Transactions Safe
A major concern during any hard fork is replay attacks, where a transaction on one chain is maliciously or accidentally repeated on the other.
Bitcoin Cash implemented two-way replay protection by modifying the transaction format. Specifically, BCC transactions include a special marker (SIGHASH_FORKID) that makes them invalid on the original Bitcoin network — and vice versa.
Thanks to this design, users can transact freely on either chain without fear of unintended duplication.
TREZOR’s firmware was updated to reflect these changes, ensuring secure handling of both networks post-fork.
👉 Learn how advanced wallet security protects your crypto across forks and upgrades
Frequently Asked Questions (FAQ)
Q: Did I automatically get Bitcoin Cash if I had Bitcoin in my TREZOR before August 1st, 2017?
Yes. If you held Bitcoin in your TREZOR wallet before the hard fork on August 1st, 2017, you are entitled to an equal amount of Bitcoin Cash (BCH). You just need to go through the claiming process to access it.
Q: Is it safe to claim Bitcoin Cash from my TREZOR?
Yes — as long as you use the official TREZOR interface (Trezor Suite). Since TREZOR never holds your private keys, and all operations happen locally on your device, the process is highly secure.
Q: Can I use the same address for both Bitcoin and Bitcoin Cash?
No. Although both currencies derive from the same seed, they use different address formats and derivation paths. Using the wrong address may result in irreversible loss of funds.
Q: What if I already sent my Bitcoin elsewhere after the fork?
If you moved your BTC after August 1st, 2017, but before claiming BCH, you likely lost access to your Bcash unless you retained control of the original private keys. Always claim forked coins before transferring funds.
Q: Why does the claiming process move my BCH to a new address?
This improves privacy and security by separating coins across chains. It also ensures compatibility with standard BCH wallets, which expect funds on properly derived BIP44 paths.
Q: Is Bitcoin Cash still active and supported today?
Yes. Bitcoin Cash remains an active cryptocurrency with its own network, development community, and use cases focused on fast, low-cost peer-to-peer payments.
Core Keywords
- Bitcoin Cash (BCH)
- TREZOR
- Hard fork
- Chain-split
- Claim Bitcoin Cash
- Replay protection
- BIP44 derivation
- Cryptocurrency wallet
Final Thoughts
The emergence of Bitcoin Cash was more than just a technical divergence — it was a statement about scalability and decentralization. For TREZOR users, it also became an opportunity to expand their crypto holdings with minimal effort.
By understanding how chain-splits work, respecting replay risks, and using secure tools like TREZOR Suite, you maintain full sovereignty over all your digital assets — past, present, and future.
Whether you choose to hold, trade, or simply observe Bitcoin Cash, knowing your options empowers better decisions in the evolving blockchain landscape.
👉 Explore secure ways to manage multi-chain assets in one place