The receipt

✓ HOLDS

A permanent, tamper-evident record of a verification. The content hash IS the proof — re-fetch it and the bytes must match, or it is not this record.

Worked trail

CONFIRMED P(5,2) = 5!/3! = 20

combinatorics.permutations: P(5,2) = 20 (matches claim)

CONFIRMED C(5,2) = 10

combinatorics.combinations: C(5,2) = 10 (matches claim)

gates

RED:PASS

content hash (the seal)

b7807a96bdad28ab5ec46b81440bc5ce34b7f534ac40a1b639088ba64de05751

raw JSON ↗ · re-check: GET /seal?hash=b7807a96bdad28ab…