Based on available public business records and corporate registries (primarily from the Baltic states, given the "OÜ" suffix—which stands for osaeühing , the Estonian equivalent of a private limited company), appears to be a defunct or inactive Estonian company.
Since the company is no longer active, you should verify with the counterparty directly. A legitimate Estonian company's status can always be checked in real time at the Estonian e-Business Register (ariregister.rik.ee). what is soltaros oü