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An open specification · Stewardship proposed to the Open Cap Table Coalition

GitHub spec@opencaptableprotocol.org
Open Cap Table Protocol

Talks and resources

Where the argument has been made in person, and the sources it rests on.

The protocol’s history section is not a rhetorical flourish. The 1969 proposal for a decentralized network of transfer agent depositories is documented in the SEC’s own record, and the regulatory positions cited in the specification are primary sources you can read yourself.

Talks

Talks

Technical · EthCC 2025

Intro to the Open Cap Table Protocol

Thibauld Favre, CTO, Fairmint

What OCP is, how it models ownership as interoperable data, and why a shared standard matters for issuers, investors and regulators — including chain choice and deployment.

Open on YouTube →

Markets · DAS NYC 2026

The Blurring Lines of Private & Public Markets

Joris Delanoue, CEO, Fairmint · Digital Asset Summit, New York

From the Rockwell report through today’s markets: why centralized clearing won for public liquidity while cap tables often lagged, and how programmable infrastructure closes the gap.

Open on YouTube →

Primary sources

Read the sources

Every claim in the specification that rests on a public document cites it. These are the documents that carry the most weight.

SEC concept release on transfer agent regulations — Release No. 34-76743 (31 December 2015)
The Commission’s own account of the 1968 paperwork crisis and of the 1969 Rockwell study, which proposed a national clearing system together with a decentralized network of individual transfer agent depositories — each transfer agent maintaining the issuer’s register electronically and settling by debiting and crediting accounts on that register. The release records widespread industry support for the model, set against the legal and technological impediments to implementing it at the time. Read the release (PDF) →
SEC staff FAQ, Question 11 — Division of Trading and Markets (15 May 2025, modified 17 December 2025)
A registered transfer agent may use distributed ledger technology as its official master securityholder file, subject to Rules 17Ad-2, 17Ad-6, 17Ad-7, 17Ad-10, 17Ad-11, 17Ad-12 and 17Ad-13, and would not need to maintain a duplicate or “digital twin” of that file exclusively off-chain. Read the FAQ →
SEC staff Statement on Tokenized Securities (28 January 2026)
Joint statement of Corporation Finance, Investment Management, and Trading and Markets, describing an issuer-sponsored model in which the issuer’s agent maintains the master securityholder file onchain, and finding that the format in which a security is issued does not affect application of the federal securities laws. Read the statement →
Commissioner Peirce, “The Journey Begins” (4 February 2025)
The statement committing the Commission’s Crypto Task Force to engage with the intersection of crypto and clearing agency and transfer agent rules. Read the statement →
Fairmint’s written submission to the SEC Crypto Task Force
An onchain securities market framework built on OCP: how a registered transfer agent maintains the issuer’s book on a distributed ledger under existing Section 17A authority, how regulators inspect it, and which existing rules require interpretation rather than replacement. Read the submission →
Open Cap Table Format
The data standard OCP extends, maintained by the Open Cap Table Coalition. Repository → · Coalition →
Canton Network key concepts
The runtime primitives the reference implementation composes with — party model, sub-transaction privacy, disclosed contracts and the Observer party. Documentation →

All fifteen references →