The Significance
Why the room needs them.
Jeffrey’s documented background brings together online-community entrepreneurship, Bitcoin authorship, podcast research and Bittensor-focused investment, providing relevant context for discussions about turning decentralised AI infrastructure into practical businesses.
The Numbers
2
Bittensor-track sessions moderated at Proof of Talk Paris 2026
2004
Year IAC reported acquiring ZeroDegrees
2016
Year Guardian Circle was launched
The Timeline
Years of shipping.
2004
IAC reported that it had acquired ZeroDegrees, the online business-networking company Jeffrey co-founded.
2013
Published Bitcoin Explained Simply, according to the Apple Podcasts listing for Hash Rate.
2015
Published The Case for Bitcoin, according to the Apple Podcasts listing for Hash Rate.
2016
Launched Guardian Circle, according to the company’s 2018 announcement.
2025
Announced the launch of Stillcore Capital, focused on TAO and Bittensor subnet tokens.
2026
Was billed as Partner at Stillcore Capital for Proof of Talk Paris and moderated two Bittensor-track sessions, according to the supplied first-party session record.
The Body of Work
What they have built, written, and backed.
Built
- ZeroDegreesAn online business-networking company co-founded by Jeffrey and acquired by IAC in 2004.
- Guardian CircleA decentralised emergency-response platform launched by Jeffrey in 2016.
- Hash RateA technology podcast created and hosted by Jeffrey, covering cryptocurrency, artificial intelligence and decentralised infrastructure.
Mark at Proof of Talk
The next Proof of Talk is in Abu Dhabi.
Louvre Abu Dhabi, 3–4 December 2026. Admission is by application, and the room is capped at 2,000.
Request access