Sample package and independent checks

A self-checkable synthetic package

The package contains synthetic content, metadata and a SHA-256 manifest. It supports reconciliation and byte-tampering checks; it contains no valid TSA token, ERS or XMLERS, so it does not establish existence time or backend conformance.

1. Extract into a new directory; read README and manifest.json.
2. Run python3 verify_sample.py on the sample package; check file completeness and digests.
3. Change one byte in a copy, rerun and confirm failure.
4. Real ERS verification requires evidence, original data, trust material and a suitable independent tool.

python3 verify_sample.py /path/to/extracted-sample

Check actual local bytes

Select a synthetic file and enter SHA-256 from a source you trust. The tool reads bytes locally without uploading; 10 MiB is this website tool’s limit, not an LTANS service limit.

Next steps