S17 E22: Jeremy Rubin on CTV, Char & Building on Bitcoin
From Bitcoin Takeover Podcast by Vlad Costea
May 6, 2026 · 1h 23m · Season 17 · Episode 22
About this episode
Jeremy Rubin discusses his work on Bitcoin improvement proposals and the challenges of building in the Bitcoin ecosystem.
Jeremy Rubin is the author of BIP 119 (OP_CTV, Check Template Verify) and co-author of BIP 348 (CSFS, Check Sig From Stack). More recently, he started working on Char: a decentralized shared sequencer for Bitcoin layer 2s. In this episode, which we recorded at the LayerTwo Labs booth during the Bitcoin 2026 conference in Las Vegas, we talk about the challenges involved in improving Bitcoin and why Jeremy chooses to be a relentless builder even in an adversarial environment. Time stamps: 00:00:48 Podcast Introduction and Sponsors 00:03:02 Jeremy Rubin's Bitcoin Journey 00:03:24 Introduction to Check Template Verify (CTV) 00:04:44 The Philosophy Behind CTV 00:06:40 CTV for Congestion Control 00:07:57 CTV for Self-Custody Vaults 00:09:35 The Failed Activation of CTV 00:11:25 The "Technical Consensus" Debate 00:13:45 FUD and Misinformation Campaign 00:17:45 Blockstream's Role in Bitcoin Development 00:21:44 The Inevitability of CTV 00:26:04 The State of the Bitcoin Ecosystem 00:28:20 Bitcoin Maximalism and Cypherpunk Spirit 00:29:34 Learning from Other Projects 00:31:52 Bitcoin Cash's Technical Progress 00:35:39 The "Small Blocker" Paradox 00:37:34 Cultural Barriers to Building…
People in this episode
Host: Vlad Costea
Guest: Jeremy Rubin
Topics covered
- Bitcoin development
- Check Template Verify
- decentralized sequencer
- Bitcoin ecosystem
- building in adversarial environments
- Bitcoin maximalism
Keywords
- BIP 119
- OP_CTV
- Check Sig From Stack
- Char
- Bitcoin 2026
- decentralized
- self-custody
- FUD
- Bitcoin maximalism
- cypherpunk
Mentioned in this episode
Organizations: LayerTwo Labs, Blockstream, Bitcoin Cash
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