Dear friends, look what i have found:

"Bakitone International MCA contains a comprehensive database of all world music competitions for all instruments. Information is detailed and up-to-date. The organization is under patronage of Vladimir Ashkenazy, who has highly recommended the website to young artists and teachers. I cordially invite you to have a look at Bakitone and its content, to see it for yourself."

http://www.bakitone.com