Key Components of a Bitcoin Block:

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What is a Bitcoin Block?
A Bitcoin block is essentially a container for a collection of verified Bitcoin transactions. These transactions are bundled together and then added to the end of the existing chain of blocks (the blockchain). Each new block is cryptographically linked to the previous one, forming an unbroken and tamper-resistant chain.


Each Bitcoin block consists of two main parts:

Block Header (80 bytes): This contains metadata hotmail email list about the block itself and is crucial for linking blocks and for the mining process. It includes:

Version: The version of the Bitcoin protocol being used.
Hash of the Previous Block (hashPrevBlock): A cryptographic hash of the header of the preceding block in the chain. This is the "chain" in blockchain, as it creates the irreversible link.
Merkle Root (hashMerkleRoot): A single hash that represents all the transactions included in the current block. It's generated from a Merkle tree, which efficiently summarizes all transactions and allows for quick verification of transaction inclusion.
Timestamp: The time when the block was mined.
Bits (Difficulty Target): A packed representation of the target difficulty that the block's hash must be less than or equal to for the block to be considered valid. This adjusts roughly every two weeks to maintain a consistent block time.