Launched by an international team on September 11, 2018, Signature Chain is a dApp on the Waves Platform that offers data certification, mutual agreement certificates, and e-mail certificates. The dApp supports FIAT transactions for purchasing SIGN tokens and does not require any browser extension or download. In mid-2020, Signature Chain started working on SIGN Art, a certified digital art gallery that utilizes the main sign-web.app certification functions to authenticate digital art source files. Additionally, SIGN Art provides a digital art NFT market. The Signature Chain team has received a grant from the Waves Association to develop and expand SIGN Art.