You could use a website such as http://walletexplorer.com, however i've just tried the adress in which the 2000$ are stored, and it returned no values, which either means these bitcoins are probably not stored on an exchange/online wallet such as coinbase, or that the adress has not yet been added to their database.


OR, https://matbea.net/btc/address/19RJxHdGjbN6QQiQxJM87Dc79cUkgbeWcH which also doesn't really return anything. I fear the worst @OP.