Verify a chest
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What is being checked
Before a chest goes live we publish a commitment: a hash that locks in the exact set of items and the secret seed that orders them. After the chest sells out or is retired we reveal the seed. With the seed and the item list you can recompute the commitment, the shuffle and every buyer's slot pick. How commit-reveal works has the plain-English version and the formulas.
Before a chest is revealed
Only the commitment binding can be checked (that the published hashes really produce the published commitment). That is by design: revealing the seed early would reveal which slot holds which item.