Sixteen digits. Nature has called it "online science passport". More than half a million researchers have already joined the initiative. The ORCID project (Open Researcher and Contributor ID) is a wide database of scientists all over the world: it collects names, short biographies, research activities, patents, citations, results, dataset. Citing from the homepage, ORCID provides “a persistent digital identifier that distinguishes you from every other researcher”. Scientists can use the code as a second signature when they submit