Pilot screening of header templates
A small pilot can select headers whose disjoint holdout has a higher below-target density than equal-work random allocation.
Diagnostic work, exact algebra and local capabilities are not treated as end-to-end mining advantage.
What was tested?
A small pilot can select headers whose disjoint holdout has a higher below-target density than equal-work random allocation.
Why the test is meaningful
Pilot hashes are real work and must be charged. Transfer requires an unseen holdout and comparison with many equal-budget random selections.
net gain=(pilot+selected holdout hits)/(same total random work)top 8 of 64 by pilot B8transfer requires panel replicationHow it was tested
Use two independent panels of 64 headers, 2^15 pilot nonces, disjoint 2^16 holdout nonces, top-eight selection and 32 matched random controls.
What happened
Across 12,582,912 exact SHA-256d hashes, panel 0 net B8 gain was 1.0094 but panel 1 reversed to 0.9926. Aggregate B8 net gain was 1.0010, Spearman −0.0955 and permutation p=0.8517.
Exactness and statistical controls
A secondary B16 gain from only 19 selected hits was retained but not promoted because it lacked replication in registered endpoints.
What the result means
Header-template enrichment did not transfer under the frozen protocol and post-hoc retuning is closed.
Limitations
- B16 was sparse and secondary.
- Only the registered pilot/holdout sizes were tested.
- Header selection does not change hash validity.
Evidence trail
Preserve disjoint pilot/holdout windows, charge pilot work and repeat both independent panels and controls.
Canonical variants
CANONICAL-EXP-140PREREGISTERED-CAMPAIGNSEALED-AUDITSource: internally audited canonical reports. Local filesystem structure, private headers and operational identifiers are excluded from publication.