Bitcoin: Quantum-Safe Spend Is Sent on Mainnet - 27 Aug 2026

StarkWare sends 3.1 BTC in a quantum-safe spend using the QSB method, with the transaction mined on Bitcoin mainnet under Bitcoin's existing rules.The mainnet transaction provides a concrete demonstration that Bitcoin can support a quantum-safe spend without a protocol-wide activation on this date. For BTC holders and custodians, it offers a possible path for addressing a long-term security concern, although the event itself does not change Bitcoin's rules or token economics.The proof is recorded on mainnet rather than only in a test environment. Its significance is therefore technological and risk-reducing: it shows the method operating within the current network framework instead of introducing a new consensus requirement.JUST IN: The first post-quantum resistant Bitcoin transaction was mined today."It required no soft forks. It required no hard forks. It required no core protocol upgrades. And it's live today."