The Worldcoin project, a startup building an identity database of users as a public utility, has reached two million sign-ups using its World ID protocol. The company — which is backed by Openai co-founder Sam Altman — reported that these sign-ups came via people registering from cities such as Barcelona, Berlin, Buenos Aires, New York, Seoul, and Tokyo, as part of the “world tour” announced in May. Overall, Worldcoin is registering more than 40,000 sign-ups each week.