Knowledge Card: Merkle Tree
A Merkle tree is a tree-shaped structure that hashes large amounts of data in pairs and combines the hashes layer by layer. The hash at the very top is called the Merkle root.
A Bitcoin block header is only 80 bytes long, and contains the Merkle root of all the transactions in the entire block.
On platforms that provide proof of reserves, you can follow the official instructions and use a Merkle path to verify your own balance yourself.
The header of every $BTC block records a Merkle root that summarizes all the transactions in that block.

The above information has been compiled from public sources. Please verify it for yourself.