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Genesis Block

The initial block in a blockchain is known as a genesis block. Because of 0-based indexing in computer science, it is commonly referred to as "Block 0" on a blockchain. Some blockchains, however, refer to the genesis block as "Block 1." The genesis block is the only one that lacks a hash link to a prior block. Hard-coded genesis blocks are common. The genesis block of Bitcoin has no transaction data. It reads,  “Chancellor on brink of second bailout for banks.” The mining reward from Bitcoin's first block is never spent.