Bitcoin's threshold for trust-minimization—without a soft fork | SAM BLACKSHEAR

Bitcoin's threshold for trust-minimization—without a soft fork | SAM BLACKSHEAR

From Bitcoin Rails | Isabel Foxen Duke by Isabel Foxen Duke

June 4, 2026 · 58 min

About this episode

Sam Blackshear discusses the technical challenges of Bitcoin and the potential of Mysten Labs' Hashi architecture for trust-minimized bridging.

Some of the most impressive technical and commercial leaders in digital assets emerged from what insiders call the "Libra Mafia" — the team assembled by Meta to build Libra (later Diem). Though the project ultimately succumbed to regulatory pressure, it produced a generation of founders and engineers who went on to shape the industry, including Sam Blackshear, a leading expert in blockchain programming languages and CTO of Mysten Labs. In this episode of Bitcoin Rails, Sam joins me to discuss: why Mysten Labs has turned its focus toward Bitcoin + why Sam leans conservative on soft-fork changes to Bitcoin script what makes a strong crypto programming language + why EVM is missing the mark\ why trust minimization remains the critical technical challenge standing between Bitcoin and broader DeFi adoption Why Mysten Lab's new Hashi architecture may be the most trust-minimized architecture for Bitcoin "bridging" without a soft fork This episode of Bitcoin Rails is brought to you by: LayerTwo Labs — developing research, software, and technologies for scaling Bitcoin via the integration of Drivechains (BIP 300/301) Hashi on Sui Network — a primitive for executing Bitcoin Defi…

People in this episode

Host: Isabel Foxen Duke

Guest: Sam Blackshear

Topics covered

  • Bitcoin
  • trust-minimization
  • blockchain programming languages
  • DeFi adoption
  • soft-fork changes
  • Hashi architecture

Keywords

  • Bitcoin
  • trust-minimization
  • soft-fork
  • blockchain
  • DeFi
  • Hashi
  • Mysten Labs
  • Libra Mafia

Sponsors

LayerTwo Labs, BitBox

Mentioned in this episode

Organizations: Meta, Mysten Labs

Products: Hashi, BitBox

Books & works: Bitcoin Rails

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