What is a source run hash?

A source run hash is the trust anchor for a sealed SDX run.

It identifies the preserved execution package that underlies later report data, reproducibility statements, and audit review. The source run hash does not make a claim by itself. Its role is to bind a human-facing or machine-facing output to the sealed evidence package from which it was projected.

This is important because report data and PDFs are public-facing or decision-facing projections. They may contain summaries, aggregates, selected values, or rendered language. The source run hash points back to the execution layer where the complete machine-readable basis is preserved.

In SDX, the source run hash supports later verification. If a claim, value, or possibility is challenged, the sealed run can be inspected and the relevant evidence path can be checked against the preserved execution package.