jm cèWªütj7bX ´çW mÀ© ^Á¯Ñ(L¨Coinbase (like many other exchanges) wait for several confirmations before accepting a deposit. While it is annoying for a user it is safer for the exchanges to do so.
https://whatsonchain.com/tx/b9504d3573d292d55f2d36c64ba609e25e718254b7d9787cd80329d9063ddf58