Wiki / People / Jeremy Rubin

Jeremy Rubin

🎙 Bitcoin Takeover guest · 1 episode
From the Bitcoin Takeover Wiki · ✓ 11 sources · 5 podcast anchors · built 2026-11-13

Author of BIP-119 (CHECKTEMPLATEVERIFY), co-founder of the MIT Digital Currency Initiative and Scaling Bitcoin, creator of Sapio and Judica, now building Char.

◆ Takeover vieweditorial · opinion, labelled

The wiki's angle: on S17 E22 Rubin described Char, his decentralized sequencer for layer twos; on S17 E38 Vlad recalled his 2022 Speedy Trial attempt for CTV.[8][10]

Contents

  1. CTV
  2. Background and projects
  3. Char
  4. On Bitcoin Takeover
  5. References

CTV

Rubin is the sole listed author of BIP-119, which “proposes a new opcode, OP_CHECKTEMPLATEVERIFY, to be activated as a change to the semantics of OP_NOP4”[1]. On S17 E22 Vlad noted that CTV “used to be called Secure the Bag at some point”[2]. In April 2022 Rubin published “7 Theses on a next step for BIP-119” on his site[3], and Optech covered the resulting discussion about activating CTV[4]. See the CTV covenant debates[5].

Background and projects

His site lists “Co-Founded the MIT Digital Currency Initiative” and “Co-Founded Scaling Bitcoin”, an MIT '16 MEng in EECS, and the MIT Bitcoin Project that gave every MIT undergraduate $100 of bitcoin[6]. It lists Sapio and Judica among his projects[6]. Keagan McClelland said he left Start9 to join Judica “to work with Jeremy on Sapio”[7].

Char

His site says he is “Building Char Network, a decentralized shared sequencer for Bitcoin Layer 2s”[6]. On S17 E22 he said: “I'm working on Char, which is a decentralized staking and sequencer for Bitcoin, for Bitcoin layer twos”[8].

On Bitcoin Takeover

Episodes with Jeremy Rubin as a guest, from the show's feed (bitcoin-takeover.com/audio/feed.xml).

References

  1. primaryBIP-119, “CHECKTEMPLATEVERIFY” (Jeremy Rubin) [archived]
  2. episodeS17 E22: Vlad on CTV's earlier name, Secure the Bag▶ listen at 3:26timestamp transcript-derived, pending a listen [archived]
  3. primaryJeremy Rubin, “7 Theses on a next step for BIP-119”, rubin.io, 17 Apr 2022 [archived]
  4. secondaryBitcoin Optech Newsletter, 27 Apr 2022, “Discussion about activating CTV” [archived]
  5. secondaryBitcoin Optech topic, “OP_CHECKTEMPLATEVERIFY” [archived]
  6. primaryJeremy Rubin, rubin.io homepage (read 13 Nov 2026) [archived]
  7. episodeS17 E38: Keagan McClelland on joining Judica to work on Sapio▶ listen at 9:41timestamp transcript-derived, pending a listen [archived]
  8. episodeS17 E22: Jeremy Rubin — “I'm working on Char”▶ listen at 1:06:00timestamp transcript-derived, pending a listen [archived]
  9. primaryBitcoin Takeover podcast RSS feed, bitcoin-takeover.com/audio/feed.xml (read 13 Nov 2026) [archived]
  10. episodeS17 E38: Vlad on Jeremy Rubin's 2022 Speedy Trial attempt for CTV▶ listen at 7:53timestamp transcript-derived, pending a listen [archived]
  11. episodeS17 E22: Jeremy Rubin on CTV, Char & Building on Bitcoin [archived]

Related

CTV and the covenant activation debates
The long fight over OP_CHECKTEMPLATEVERIFY (BIP-119): Jeremy Rubin's 2022 Speedy Trial plan, a 2025 open lette
Keagan McClelland
Start9 co-founder who left to work on Sapio at Judica, later worked at Lightning Labs, and now verifies Bitcoi
Judica
Jeremy Rubin's company for building DAOs and contracts on Bitcoin with the Sapio language, where Keagan McClel
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