You should tell Bittrex the Transaction ID and the exact amount ASAP. If it is not crediting to your account there you probably didn't send the transaction with the correct payment ID (needed to discern between depositors because each wallet only has one address).

There are no current blockchain explorers for BBR. But that wouldn't matter anyway: transactions are anonymous without the viewkey. Bittrex has the viewkey for their address, and Bter has the viewkey for their address. With one of those one could theoretically prove that the transaction was sent to Bter.

edit: With a block explorer you could determine the transaction was sent but not where it was sent or the amount.