How do I get Bitcoin transaction hash?

you cannot . there is no public database to look that up. the only thing you can do with a bitcoin address is scan the blockchain for it. it will reveal all transactions so you can calculate the balance.

Open your Bitcoin.com wallet app and tap the ‘Send’ button at the top of the Home screen. Copy and paste the recipient’s wallet address into your own wallet app. If you’re in person, select “Scan QR code” and simply scan it with your app .

In many cases, a transaction hash is needed in order to locate funds. It commonly appears at the top of the page when viewing your transaction through a block explorer website, or can be found by copying the URL from that same page .

The trail of Bitcoin addresses allegedly links all that money to online illegal drug sales tracked by FBI and Interpol . If Bitcoin’s privacy shortcomings drive users away, the currency will quickly lose its value.