CheckSig, a European 'crypto-as-a-service' platform, has successfully raised €3.5 million in a Series A funding round, valuing the company at €33.5 million. According to ChainCatcher, this brings the total funding for CheckSig to €6.2 million. The company has obtained a MiCAR license this year and offers services such as crypto custody, trading, and tax withholding for cryptocurrencies. CheckSig aims to provide secure and transparent cryptocurrency services for both individual and institutional investors.