Security · Oct 16, 2026

7 checks before you trust a new wallet to split your XBT and BTC

By xbt.live · 4 minute read

New wallets that promise to split your pre-fork coins keep appearing, from builders on both sides of the fork. Some are good. Some are rushed. A few will be traps. Because your pre-fork XBT and BTC share the same keys, any app you give your seed to can move both. Run these seven checks before you trust one.

1. Is the code public, and does the download match it?

Open source is the minimum. Better: signed releases or reproducible builds, so you can confirm the app you install was built from the code everyone can read. A closed-source "splitter" is a hard no.

2. Did you get it from the project's own page?

Download only from the project's repository or release page, not from a link in a reply, a DM or an ad. Check the signature or file hash when the project publishes one. Copycat downloads are the oldest trick in crypto.

3. Does it need the seed that holds your bitcoin?

This is the big one. A pre-fork seed controls your coins on both chains. Typing it into a new app on an internet-connected computer hands that app your bitcoin too. Safer options:

Sign with a wallet that's already been used and reviewed by others: Knots BLAKE2b, the Sparrow BLAKE2b build or Shrike. See replay protection, explained for the list.
Keep your keys on a hardware signer and use the new app only as a watch-only wallet. Our cold storage guide builds one for about $60.
Never enter a seed into a website. No legitimate split or "claim" needs one.

4. Does it actually sign with replay protection?

XBT's opt-in replay protection is a signature flag called SIGHASH_UNIFIED. A signature made with it ends in the byte 21 instead of the usual 01, and bitcoin nodes reject it. After a test spend, open the transaction on an XBT explorer and look at the end of the signature. If it ends in 01, that spend could be replayed on bitcoin.

Some tools use other methods, like adding a coin that only exists on one chain or an extra data output. Those can work too. Whatever the method, check that the claim matches what you see on chain.

5. Did you test with a small amount first?

Split one small coin before anything that matters. Then check both chains: the XBT should have moved to your new address, and the same coin on bitcoin should still be where it was. If both moved, stop.

6. Who built it, and has anyone else checked it?

A day-old release announced in an angry post is not the same as a tool that's been used for weeks with issues reported and fixed. Look for an issue tracker, other users' results and a builder with a track record. If you can't find any, wait.

7. Does anyone else ever hold your coins or keys?

Services that split "for you", sites that ask you to "claim" XBT and support agents who ask for your seed are all the same thing: theft. You never need to hand over a seed or private key to split coins.

The short version

Open code, official download, no seed into anything new, check the signature, test small, wait for a track record, never hand over keys. And remember: if you bought your XBT on an exchange or mined it, there's nothing to split. Those coins only exist on XBT.

Replay protection, explained Six mistakes that cost people XBT

For education only. Not financial or security advice. xbt.live doesn't audit wallets. Community wallets and firmware are unaudited; test with small amounts.

Have an XBT story? Write for xbt.live.

Life support

So the patient was moved to the emergency room. In August, the SHA-256 miners left on their own chain, and the nodes enforcing BIP-110's rules kept going without them. At the end of the month, the rule-keeping chain switched its mining to BLAKE2b so the captured SHA-256 hash couldn't take it over. That chain is XBT. The full story is in How Bitcoin kept its rules and moved to BLAKE2b.

Patients on life support don't look healthy, and XBT doesn't either. About 102 XBT buy one BTC. It has had three bear markets in six weeks. That's what a rescue looks like from the outside. The people in the ER right now, the node runners, the miners, the builders shipping wallets and pools every week, are doing the work while the outcome is anything but certain. If the patient makes it, they're the ones who saved it.

The strangest part: you already own it

If you held bitcoin before Aug 8, 2026, you hold XBT. Same coins, same addresses, same keys. The proof of work that secured your coins for 17 years secures them on both chains, because the history is identical up to block 961,631. Every UTXO that existed before the split exists on XBT. The XBT you hold cost you exactly what your BTC cost you.

Since the split, the two histories have gone different ways. XBT's blocks follow BIP-110's rules: less data that isn't money, a cleaner chain going forward. Not sure what you hold? Check an address.

Two places at once

The body is still on the old chain: the brand, the network effect, the exchange listings, the ticker everyone knows. That doesn't disappear overnight, and we won't pretend it does.

But the thing that made Bitcoin worth caring about was never the brand. It was the idea: money that no state, no company and no small group of operators can change on users without their consent. That idea now lives on the chain whose users enforced their rules when it mattered. The body stayed. The soul moved.

Bitcoin was always a quiet way to separate money from the state. It still is. It just lives somewhere new.

Opinion. Not financial advice. XBT trades on thin markets and can lose most of its value quickly. Price figures as of the evening of Oct 10, 2026 (US Eastern).