BTQ Technologies has unveiled the first working implementation of Bitcoin Improvement Proposal 360 (BIP 360), marking an early but concrete move to test quantum-resistant transaction infrastructure in a live environment. The company announced on Thursday that the upgrade is now running on Bitcoin Quantum testnet v0.3.0, a separate blockchain created to simulate how Bitcoin could function in a post-quantum world.
This matters because BIP 360 has moved beyond theory. Instead of remaining a proposal discussed only in research or protocol design circles, it now exists as running code that developers, miners, and researchers can interact with directly. In practice, that gives the ecosystem a place to test what quantum-resistant Bitcoin-style transactions might look like under real network conditions.
At the center of BIP 360 is a new transaction format called Pay-to-Merkle-Root, or P2MR. The format changes how transaction data is committed on-chain. According to BTQ, the design removes the need to expose public keys on certain transaction paths. If quantum computers eventually become powerful enough to break current cryptographic assumptions, limiting public key exposure could become a critical security property.
Olivier Roussy Newton, CEO of BTQ Technologies, said in the company’s press release that “BIP 360 represents the Bitcoin community’s most significant step toward quantum resistance and we’ve turned it from a proposal into running code.” The statement captures the company’s broader message: this is no longer just a discussion about future threats, but an engineering effort that can be evaluated in code.
BTQ also argues that the implementation does not come at the cost of Bitcoin’s broader scaling path. The company says P2MR remains compatible with scripting features that support systems such as Lightning and emerging frameworks including BitVM and Ark. At the same time, it removes the key-path spend mechanism introduced with Taproot, which BTQ believes could expose public keys to quantum attacks under certain conditions.
Beyond the transaction structure itself, the release includes a full wallet toolset. Users can create, fund, sign, and broadcast P2MR transactions on the testnet. That end-to-end functionality is important because it makes the proposal immediately testable rather than leaving it as an academic construction or a partial prototype with no usable transaction flow.
Quantum-resistance experimentation moves into practical testing
BTQ’s wider objective is to accelerate experimentation around quantum-resistant infrastructure at a time when long-term cryptographic risk is getting more attention. According to the company’s release, the Bitcoin Quantum testnet currently includes more than 50 miners and has processed over 100,000 blocks. Those figures suggest that the network is more than a static demonstration. It is already operating as an active test environment with repeated block production and ongoing participation.
From a technical perspective, a separate test network offers a useful advantage. It allows protocol designers to test transaction layouts, scripting assumptions, wallet behavior, and validation logic without introducing instability to Bitcoin’s main network. For a change tied to quantum resistance, that isolation matters. Small mistakes in address construction, signing flows, or verification rules can have large consequences, so repeated testing in a live but independent environment is a practical step.
Still, the progress in code highlights a deeper obstacle: adoption. BTQ has effectively moved outside Bitcoin’s traditional governance route by launching its own testing chain rather than waiting for broad consensus in the main ecosystem. That choice reflects a long-standing reality in Bitcoin. Major protocol changes are rarely quick or simple because they usually require broad alignment among developers, miners, node operators, and users.
Christopher Tam, BTQ’s head of innovation, described the issue in direct terms when speaking to Decrypt. “It’s a social problem,” he said, pointing to the challenge of coordinating change across a decentralized network with entrenched stakeholders. In Bitcoin, technical validity alone is usually not enough. Even a well-designed upgrade can stall if the community does not agree on the risk, the timing, or the tradeoffs.
Can a parallel chain influence Bitcoin’s future?
BTQ’s strategy raises an obvious question: how much influence can a parallel chain really have on Bitcoin itself? Bitcoin Quantum does not share Bitcoin’s ledger or balances. It starts from a new genesis block and operates with its own native asset and its own ruleset. That means users do not automatically inherit the upgrade. Participation requires an explicit opt-in.
In that sense, Bitcoin Quantum is best understood as an experimental proving ground rather than a direct extension of Bitcoin mainnet. This structure gives BTQ freedom to iterate faster and test more aggressively, because it does not need prior approval from the full Bitcoin ecosystem. But the same separation also limits its immediate impact. Even if BIP 360 performs well on the testnet, success there does not automatically translate into adoption on Bitcoin itself.
Bitcoin’s history shows that meaningful protocol-level changes usually involve extended public debate and slow coordination. Questions around scaling, script capabilities, signature design, and backward compatibility have all demonstrated how difficult consensus can be in a decentralized system. BTQ’s implementation may make the debate more concrete by providing working code, but it does not remove the need for ecosystem-wide agreement.
That may be the most practical value of the project today. It turns quantum-resistance from a mostly abstract concern into something developers and researchers can inspect, test, criticize, and improve. In open-source networks, working implementations often change the quality of debate because they replace hypothetical claims with observable behavior.
BIP 360 addresses only part of the quantum threat
Even with a live implementation, BIP 360 covers only part of the broader quantum-risk picture. Christopher Tam noted that while the proposal can help secure future transactions, it does not retroactively protect older addresses that may already have exposed public keys. That distinction is crucial because one of the feared attack paths in a post-quantum scenario is the ability to derive a private key from a known public key.
In Bitcoin, once certain addresses have revealed their public keys through prior transaction activity, they may carry additional long-term risk if powerful quantum machines eventually emerge. As a result, stronger protection for new transaction formats does not automatically solve the problem for existing coins, historical UTXOs, or previously used address types. Any broader migration strategy would require more than a new output format alone.
Even so, the sense of urgency has not disappeared. Researchers broadly expect that sufficiently advanced quantum computers could eventually break the elliptic-curve cryptography that secures Bitcoin today. The uncertainty lies in the timeline, not in the possibility itself. No one knows whether that capability is years away or much further out, which is exactly why some teams argue that testing alternatives early is the rational path.
For now, BTQ’s work functions as an early proving ground. It shows that BIP 360 can be implemented, deployed, and used in practice. Whether that work eventually influences Bitcoin proper may depend less on the existence of code and more on the willingness of the broader community to converge around a shared response to quantum risk.