OP_RETURN, Bitcoin PIPEs v2, and More — Bitcoin Optech Newsletter #393 The Bitcoin Optech technical newsletter covers OP_RETURN usage, updates on PIPEs v2, and practical recommendations for developers and infrastructure operators. It includes compatibility analysis, best practices, and operational risks associated with proposed on-chain use cases. Comment: If you implement indexers, on-chain metadata, or Layer 2 tools, incorporate the newsletter's recommendations into your testing pipeline and security guidelines. Reviewing OP_RETURN and PIPEs prevents compatibility issues and improves service resilience. https://bitcoinops.org/en/newsletters/2026/02/20/