LEDGER ensures data sovereignty and eliminates concentration of data in a few proprietary platforms by accelerating 34 bottom-up experiments on human-centric values (privacy-by-design, reliability, trustworthiness and openness as core values) and 6 verticals (Health, Finance, Media, Public Services and Energy plus a generic one 'Open Disruptive Innovation). LEDGER will overcome Non-technological (Admin burden, Searching costs, bias in grant distribution, lack of use cases, User awareness, Access to Finance, Lock-in, Entrepreneurial Discovery and Regulation gap) and Technological barriers (Lack of Standards, lack of playground environments and Access to knowledge). LEDGER´s architecture relies in Mission-oriented, Market pull, Entrepreneurial discovery, Smart funding and Open-Technology. LEDGER will build on EC projects related to data governance: DECODE, D-CENT and PIE NEWS. 400 teams will be activated to develop the best applications that will run through a Minimum Viable Product Builder including mentoring and access to the Distributed Ledger Technology from DEVUAN.org. Up to 200k euros for the best teams will get startups ready for Venture Capital, pre-Initial Coin Offering and/or crowdfunding. LEDGER partners complete the community building, discovery, tech transfer and sustainability cycle. FundingBox - European leader in Financial Support to Third Parties will attract startups from its 15.000 members platform. DYNE will bring researchers and developers from its 10.000 members. Blumorpho will engage Researchers (7.200), Entrepreneurs (7.400) and investors (800) to guarantee sustainability. Linking with other ecosystem this ads to 110.000 people incl. 60% of potential Human Centric Innovators. 80 evaluators and 40 State-of-the-Art experts will develop alternative models that preserve wealth created by data-driven platforms that is equally distributed. LEDGER will transform Europe into the world leading human centric and data sovereign Entrepreneurial Union.