Since the user mentioned "verified," I need to ensure that the information is accurate and reliable. There might be a lot of user-generated content with similar names, so verifying authenticity is key. I should look for official sources, maybe Eduardo Diaz's official website or publications from reputable musical institutions. Also, checking music forums or directories could help. It's possible that the PDF is a compilation that's not officially released by him, so there might be copyright issues here.