Chain vs Hash

A chain in blockchain refers to the sequential connection of blocks through cryptographic links, where each block references the previous one, creating an unbreakable, chronological record of all transactions from the genesis block to the present.

A fixed-length string of characters produced by applying a cryptographic algorithm to input data, serving as a unique digital fingerprint that blockchain uses to verify data integrity, link blocks, secure transactions, and enable mining through its one-way, deterministic, and collision-resistant properties.