As of my last knowledge update in October 2023, there is no widely recognized artist by the name of Istvan Sarkozy in the music industry. It is possible that you may be referring to a lesser-known figure or a misspelling of another artist's name. However, if you meant to inquire about an artist with a similar name or a specific aspect of music history, please provide additional details, and I would be happy to assist you with relevant information.