Building a decentralized organization that runs smoothly is not easy. We’ve learned from those who came before us, from the DNS to The DAO.

IPDB is coordinated by the IPDB Foundation, which is made up of its member caretakers and its elected management board. The IPDB Foundation advances the research of blockchain technology and decentralized governance for the benefit of society.

IPDB Governance


The IPDB Foundation is made up of member organizations we call caretakers. Our caretakers elect our management board and run the nodes that store and validate blocks containing the transactions sent to IPDB.

IPDB Governance

Public interest mandate

A majority of caretakers must be not-for-profit organizations so the mission will take priority over profit.

IPDB Governance

Jurisdictional diversity

Less than half of the caretakers can be based in any one legal jurisdiction, so a single legal attack can't shut down the network.

IPDB Governance

Geographical diversity

Our caretakers are based around the world to limit disruption from regional events such as power outages or natural disasters.

IPDB Governance

Management board

Caretakers elect the management board, which is responsible for the day-to-day operations of IPDB.

Management Board

The management board oversees the day-to-day operations of the IDPB Foundation. The management board is elected by the caretakers for a two year term.

David Holtzman


David Holtzman is an information technology security expert, educator and activist. He started his career as a cryptographic analyst, military codebreaker, U.S. Naval Security Group submariner, and Soviet Manned Space Program analyst. Holtzman is an early-stage internet pioneer.

He was the CTO at Network Solutions when it managed the domain name system, where he oversaw the explosive growth of the commercial internet to more than 20 million domain names by the late 1990s. He is the author of Privacy Lost: How Technology is Endangering Your Privacy, and a regular commentator for major news media, including Bloomberg Television, BBC, CNN, The New York Times, Business Week, and The Washington Post.

Constance Choi


Constance Choi is the co-founder and Director of COALA, an international multidisciplinary collaborative research and development initiative on blockchain technologies, smart contracts, and decentralized autonomous applications. Choi co-founded and was General Counsel and Chief Compliance Officer of the Kraken digital asset exchange.

She holds a J.D. from UC Berkeley School of Law, and undergraduate degrees from Brown University and University of Cambridge. She has practiced at several law firms, including the Electronic Frontier Foundation, focusing on internet and technology law, intellectual property, privacy, data security, and constitutional rights.

Greg McMullen


Greg McMullen is a lawyer, internet advocate, and Chief Policy Officer at BigchainDB, where he built the framework for the IPDB Foundation and helped bring together its founding caretakers. He is a leading member of the COALA IP working group and co-authored the COALA IP specification and policy paper.

Before joining BigchainDB and IPDB, he was a litigator at one of Canada’s top class actions law firms, where he worked on class actions involving privacy, copyright, competition law, and price fixing conspiracies. He served on the board of directors the BC Civil Liberties Association, Canada’s largest civil liberties organization, and authored the BCCLA’s guide to privacy and security when crossing borders with electronic devices.

Dr. Nina-Luisa Siedler


Dr. Nina-Luisa Siedler is a lawyer and partner at DWF Berlin with over 15 years of experience. She is interested in FinTech and decentralized technology, and her practice includes blockchain matters. She is an advisor to Blockchain Hub Berlin.

Dr. Siedler is specialized in structured finance, including credit and capital market instruments, especially acquisition and project financing, real estate transactions, asset-backed securities, structured cover bonds, debt loans, and corporate bonds.

Kaspar Korjus


Kaspar Korjus is the Managing Director of Estonia’s e-Residency program, which offers a fully digital identity for global citizens. e-Residency is built on inclusion, transparency, and legitimacy. It is meant to empower citizens globally and provide world-wide digital and financial inclusion.

Korjus was chosen by Megan Smith, CTO of the United States, as one of 20 digital leaders for the Global Leaders Digital Exchange (GLDE) program, and is listed in Forbes Estonia’s “30 under 30” as #1 in Technology and Finance.

Science & Research

The IPDB Foundation advances science and research.

The IPDB Foundation promotes science and research on the operation of scalable blockchain databases, the governance of decentralized systems, and the applications of blockchain technology.

The IPDB Foundation has taken a leading role in the Berlin blockchain community. We co-organized the 9984 Summit, a two-day conference in Berlin bringing together top blockchain thinkers from around the world. We co-organize the IPDB-BigchainDB Meetup in Berlin. We have sent speakers to numerous conferences and events in Berlin and across the EU, and have published numerous blog posts on blockchain technology.

In the future we will continue to make our work available in many ways——hosting or presenting at conferences and workshops, publishing research results and technical papers, releasing open source software, and more. Everything we do will be made available online, for the benefit of the public.