A blockchain transaction validation process typically involves several steps to ensure the integrity and authenticity of transactions. First, when a transaction is initiated, it is broadcast to a network of nodes. Each node independently verifies the details against pre-defined consensus rules. Once validated, the transaction is bundled with others into a block. This block is then added to the blockchain after achieving consensus among the nodes, ensuring that it is permanently recorded and tamper-proof. The decentralization of this process enhances security and trust in digital transactions.