Stay up to Date on the Latest in Bitcoin Tech

Oct 26 - Nov 1, 2026

Subjective information hazards in blockchain systems pose significant challenges due to their permanent, immutable storage and lack of granular user control. There is a clear demand for protocols enabling safe local redaction of such hazards, empowering node operators to exclude personally sensitive data without sacrificing archival functionality, though no robust solutions or active development exist in this domain [Information Hazards and Safe Redaction](https://delvingbitcoin.org/t/information-hazards-and-safe-redaction/3007). A compact and formally verified multiplication routine for Bitcoin Script has been developed, overcoming prior consensus constraints by supporting safe 16-bit multiplication within BIP-342’s 4-byte operand limits. The implementation, accompanied by Coq proofs and comprehensive test harnesses, highlights the trade-offs between consensus-agnostic soundness and bytecode efficiency, with ongoing research into further optimizations and its applicability should future protocol upgrades occur [Multiplication in Tapscript](https://delvingbitcoin.org/t/multiplication-in-tapscript-today-371-bytes-no-soft-fork/3010). Bitcoin Core v32.1 introduces critical security updates, performance enhancements, and expanded peer-to-peer capabilities, while rendering versions 29.x and earlier obsolete and unsupported. Notable improvements include refined Tor and I2P networking, global transaction relay rate limiting, GUI enhancements, and strengthened wallet, mining, and REST API functionality, with full upgrade and release notes available at [Bitcoin Core v32.1 Released](https://delvingbitcoin.org/t/bitcoin-core-v32-1-released/3008). Recent experimentation with eltoo-style state channels using APO+CTV, CSFS+CTV ladders, and the new TEMPLATEHASH+CSFS+INTERNALKEY scripts demonstrates significant reductions in update witness size and script complexity. The latest approach, leveraging TEMPLATEHASH, enables more flexible and concise channel update logic, as evidenced by reproducible test transactions and openly available reference scripts [Eltoo State Chain with Templatehash](https://delvingbitcoin.org/t/eltoo-state-chain-on-signet-third-time-templatehash-csfs-internalkey/3012). Additional developments include the launch of a user-friendly, daily-updated bitcoin-dev mailing list archive with advanced thread navigation and author indexing [bitcoin-dev Archive](https://delvingbitcoin.org/t/we-made-the-bitcoin-dev-mailing-list-readable-15-years-24-699-messages/2985), active testnet progress and open review for FinalisCore’s deterministic BFT finality and confidential UTXOs [FinalisCore Update](https://delvingbitcoin.org/t/update-and-open-questions-on-finaliscore-deterministic-bft-finality-confidential-utxos-from-genesis/2980), an innovative cost-backed identifier scheme to strengthen Sybil resistance via memory-bound proofs [Satoshi Hike 2.3](https://github.com/groundinglab/pcoc), and a new protocol proposal for accelerating block propagation through mempool-level soft agreement based on Snowball consensus variants [Snowball to Snowstorm](https://delvingbitcoin.org/t/snowball-to-snowstorm/3014).

Oct 12 - Oct 15, 2026

The newly developed **btc-safe** is a watch-only Bitcoin multisig coordinator that improves the security of multisignature transactions by allowing co-signers to independently sign transactions from separate devices, with the transaction only broadcasting after meeting a minimum approval threshold. This tool supports a variety of hardware wallets and software solutions and includes advanced security features such as TOTP two-factor authentication and role-specific account management, enhancing its functionality and user security. The complete codebase and a trial version on a signet test network are available for interested users and developers at [this GitHub link](https://github.com/tom2o17/btc-safe) and can [try it here](https://web-production-56752.up.railway.app). Source URL: https://delvingbitcoin.org/t/open-source-bitcoin-multisig-coordinator-shared-signing-queue-hardware-wallets-live-signet-demo/2957. Bitcoin's evolution from a peer-to-peer electronic cash system to a reserve asset highlights significant shifts, including its increased accumulation by large entities and decreased use in everyday transactions. This transformation raises questions about Bitcoin's role in reinforcing economic disparities and suggests a potential departure from its democratizing ambitions, prompting discussions about alternative digital currencies like "humanitycoin" aimed at more egalitarian principles. Source URL: https://delvingbitcoin.org/t/from-peer-to-peer-cash-to-elite-settlement-layer-is-the-21m-cap-building-a-new-aristocracy/2959. A new protocol integrates with Bitcoin Improvement Proposals to enhance the security of multiparty transactions using cryptographic techniques like elliptic curve cryptography and a discrete logarithm proof mechanism. This protocol ensures robust security in multiparty signing and remains compatible with existing Bitcoin protocols, contributing to the efficiency and interoperability within the Bitcoin ecosystem. Further cryptographic analysis and peer reviews are anticipated to solidify the protocol's security claims. Source URL: https://delvingbitcoin.org/t/silent-payments-for-multiparty-wallets/2960. The release candidate for Bitcoin Core v32.0rc4 is now available, marking a significant step towards the final release of Bitcoin Core v32.0, assuming no critical issues arise during testing. Interested individuals can download the binaries and access preliminary release notes and a detailed testing guide through [Bitcoin Core's official website](https://bitcoincore.org/bin/bitcoin-core-32.0/test.rc4) and [GitHub](https://github.com/bitcoin/bitcoin/tree/v32.0rc4). Feedback from this testing phase is crucial for the upcoming official release. Source URL: https://delvingbitcoin.org/t/bitcoin-core-32-0rc4-is-now-available/2958.

Oct 6 - Oct 11, 2026

The recent discussions from various mailing lists reveal significant advancements and considerations in blockchain technology and cryptocurrency frameworks. A novel Layer 2 (L2) transaction system proposed by Adam Gibson and detailed in the [Lichen Draft Paper](https://github.com/AdamISZ/lichen/blob/master/papers/lichen-draft.pdf) allows for secure, co-owned contract transactions on the Bitcoin blockchain without requiring trust in a central hub's honesty. This system leverages multi-signature setups and cryptographic proofs to ensure user control over funds even if the hub goes offline, potentially expanding to support complex smart contracts and high-privacy transactions. Luke Carriere has introduced a draft to standardize enforcement policies for blockchain co-signers, aiming to enhance interoperability across different security products like Liquidium and Lendasat. This draft, outlined in [Draft BIP](https://github.com/lukecarriere/bip-cosigner-spending-policies/blob/main/bip-cosigner-spending-policies.md), suggests a unified format for various verification methods and conditions, fostering greater compatibility and security in co-signed transactions across diverse blockchain applications. Furthermore, an emerging protocol named Cassis, as discussed at [Cassis](https://cassis.cash/), proposes a streamlined method for conducting payments across multiple blockchain layers using Hash Time Locked Contracts (HTLCs). This approach not only simplifies transaction routing via various solvers but also enhances user flexibility in managing privacy and security settings without sacrificing functionality. The ongoing development and challenges of this protocol are actively documented and accessible on [GitHub](https://github.com/cassiscash/cassi), inviting contributions to refine and optimize this innovative payment mechanism.