Independent verification of the DoubleReferenceMethod-FCP-calculator example (TRECI workflow, Cu/water): the full double-reference alignment chain recomputed from the shipped case_1 data reproduces every logged value exactly. PZC 0.6229 V vs SHE; applied potentials -0.4956, -0.7501, -1.0002 V vs targets -0.5, -0.75, -1.0 V.