Wiki / People / Jameson Lopp

Jameson Lopp

🎙 Bitcoin Takeover guest · 2 episodes
From the Bitcoin Takeover Wiki · ✓ 8 sources · 5 podcast anchors · built 2026-11-13

Co-founder and Chief Security Officer of Casa, writer of Cypherpunk Cogitations, and a speaker at events across the fork divide.

◆ Takeover vieweditorial · opinion, labelled

The wiki's angle: Lopp shows up in this wiki in rooms where small blockers are rarely seen — an Ethereum Classic summit and, by Kurt Wuckert's account, a stage next to Craig Wright.[4][5]

Contents

  1. Work
  2. On the show
  3. On Bitcoin Takeover
  4. References

Work

Lopp's site lists him as “Casa Co-founder & Chief Security Officer”, an angel investor and an adviser to CCSS and AnchorWatch[1]. His GitHub account, jlopp, dates from May 2010 and gives his company as Casa[2]. Cypherpunk Cogitations describes itself as “an independent publication launched in August 2024 by Jameson Lopp”[3].

On the show

Bob Summerwill said on Bitcoin Takeover that “Jameson Lopp spoke both times” at the Proof of Work Summit he organised[4]. Kurt Wuckert Jr. recalled that Lopp appeared at an event right before or after Craig Wright and said, in Kurt's paraphrase, that he did not know whether Wright was Satoshi[5]. Charlie Spears said Lopp gave a dynamic block size increase talk at an OP_NEXT event[6].

On Bitcoin Takeover

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

References

  1. primaryJameson Lopp, lopp.net (read 13 Nov 2026) [archived]
  2. primaryGitHub profile jlopp (Jameson Lopp), company Casa [archived]
  3. primaryCypherpunk Cogitations, “About this site” (Jameson Lopp’s publication) [archived]
  4. episodeS17 E42: Bob Summerwill on Jameson Lopp at the Proof of Work Summit▶ listen at 3:31:02timestamp transcript-derived, pending a listen [archived]
  5. episodeS17 E39: Kurt Wuckert Jr. recalls Jameson Lopp on Craig Wright▶ listen at 2:42:40timestamp transcript-derived, pending a listen [archived]
  6. episodeS17 E13: Charlie Spears on OP_NEXT and the OP_RETURN debate▶ listen at 1:23:04timestamp transcript-derived, pending a listen [archived]
  7. episodeS15 E66: Jameson Lopp on Michael Saylor, Bitcoin Ossification & Paranoid Crypto Anarchism [archived]
  8. episodeS14 E9: Jameson Lopp on Casa, Self Custody & Bitcoin Maximalism [archived]

Related

Ethereum Classic (comparison — not a Bitcoin fork)
Not a Bitcoin fork: the original Ethereum chain that kept running when the Ethereum Foundation's July 2016 har
Craig Wright
Australian computer scientist who claimed to be Satoshi Nakamoto; the UK High Court ruled in 2024 that he is n
The 2025 OP_RETURN fight
The 2025 dispute over Bitcoin Core lifting its default OP_RETURN limit, which pushed opponents to Bitcoin Knot
Kurt Wuckert Jr.
Self-described Bitcoin historian on the BSV side, CoinGeek author and GorillaPool operator, interviewed on Bit
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