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What does a blockchain let participants agree on?

Start with shared records and valid state.

  1. TransactionValidate and include
  2. Valid blockConfirm under protocol
  3. Shared history
Relationship sketch · arrows show responsibilities and connections, not a complete protocol sequence.

A blockchain organizes transactions into linked blocks. Participants follow rules for valid updates and their ordering.

Imagine two requests spending the same one-use entitlement. Both may carry valid signatures, yet their order determines which can be accepted. Replicating the requests alone does not settle that conflict.

A chain records state changes accepted under its rules. Whether an external event occurred, or a real-world right is enforceable, requires additional evidence.

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Does an on-chain record prove an external claim is true?

No. Protocol validation and verification of external facts are different tasks.

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