After withdrawal completed you can check the status using the transaction hash id.
The steps are,
Go to Dashboard page last Crypto Deposit/Withdraw details.
You will get the transaction id and Fees details by click 'i' icon for the corresponding withdrawal open the Explore link.
It will open the transaction details in BTC block explorer page tradeblock.com
Contact the receiving address side with the transaction id. Get the information regarding the number of block confirmations required to credit the BTC in their wallet.
The number of confirmations required to credit in the receiving address side vary between wallet/exchanges.
Once it broadcasted in the blockchain it will be added in the withdrawal address depends on the network congestion.