What exactly is a “Merkle tree,” often mentioned in exchange proof of reserves?
A Merkle tree is a tree-like structure that hashes large amounts of data in pairs and combines them layer by layer. The hash at the very top is called the Merkle root.
The data in a light wallet depends on the node it connects to. For large incoming payments, it’s a good idea to cross-check them on several block explorers.
The header of every $BTC block contains a Merkle root corresponding to all the transactions in that block. Currently: 83056.01.
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