Matched-Seed Ensemble Controls and Transport Diagnostics for ECG External Evaluation: Prospective Extension Protocol

Prospective extension protocol for matched-seed ECG ensemble controls and external transport diagnostics. The deposited bundle fixes five new training seeds per family (101, 202, 303, 404, 505), equal-budget ResNet–ResNet, JEPA–JEPA and ResNet–JEPA probability blends, scoring of 4,587 previously excluded SPH recordings, retrospective threshold and calibration diagnostics, paired patient uncertainty, and fixed-window full-waveform inference for 5,442 longer recordings. Historical SPH outcomes were already known when this protocol was prepared. This deposit specifies new analyses before their execution; it does not retrospectively preregister the original study or establish an untouched confirmatory cohort. No new outcomes from these extensions have been computed. Bundle SHA-256: 2eb3a319832673cf9aff9a758b9c9002e58c220dd025d7bfcbd4e0707b12e13c. The ZIP contains the protocol, analysis registry, data-free analysis code, synthetic tests and source recipe hashes. No ECG records, patient-level predictions or credentials are included.