Is Blockchain used in Brazil?

Could you please elaborate on the question, "Is Blockchain used in Brazil?" I'm particularly interested in understanding how blockchain technology is being applied in Brazil, if there are any specific projects or initiatives that are leveraging it, and what the overall impact has been in terms of industry adoption, regulatory framework, and potential for further growth? I'm also curious to know if there are any challenges or obstacles that Brazil faces in integrating blockchain technology into its economy and financial system. Could you provide some examples or insights into these matters?