Learn how to verify a Bitcoin transaction using its TXID and a block explorer, how many confirmations you need, and how to spot a fake payment.

A new block arrives about every ten minutes. Until one does, a payment waits in the mempool, and the fee rate decides its place in the queue. Payments that have been sent but are not in a block yet.

Over 95 percent of all the bitcoin that will ever exist has already been mined. Of the 21 million coin limit, about 20.1 million are out in the world. The ...

Bitcoin block timestamps can run backward. Galaxy's Alex Thorn explains why miners set the clock and why the hash chain still ...