# Frozen BTC 6H observation checkpoint

`btc6h_observation.tar.xz` contains the sealed three-policy bundle, initial
awaiting-data receipt, fixed-candidate evaluation and full fast-test log.
`manifest.json` records the archive SHA-256 and every regular member's hash.
The archive was reopened and every member verified after creation.

Restore from the repository root into an empty target:

```bash
tar -xJf results/research_checkpoint_2026_09_24/btc6h_observation.tar.xz
```

Do not extract over a bundle with later observations. The source snapshot inside
the bundle preserves evaluator bytes; observation additionally checks the current
checkout against their hashes. Raw chart data is not duplicated in this archive.

See [the runbook](../../docs/mlp_observation_2026_09_24.md) for the cutoff, results,
future-data command and limits, and [the review receipt](review.md) for coverage.