SZLHOLDINGS/david-leads-data

David Leads — Federal Refresh Snapshots

Immutable, hash-chained snapshots of normalized public federal records serving the David Leads Space. Produced by the federal-refresh workflow in szl-holdings/david-leads (issues #103; PRs #104, #105, #106).

Layout

• snapshots/YYYY-MM-DD/snapshot.json — snapshot metadata (sha256 of upstream bytes, records_hash, created_at, freshness_days)
• snapshots/YYYY-MM-DD/receipt.json — PurIQ v1 receipt (a11oy #1814); UNSIGNED is honestly labeled until a signing key is configured
• snapshots/YYYY-MM-DD/records.jsonl — normalized source records, one JSON object per line
• latest.json — pointer to the current snapshot

Verification

Every snapshot passes six checks before publish and again at consumption: per-record content-hash recomputation, records_hash chain, receipt payload_hash, signed-receipt key_id presence, gate-must-be-pass, and staleness window. Verifier: tools/ingestor/verify_snapshot.py.

Estate law

Snapshots are immutable (dated paths never overwritten). No sample substitution. No live-web calls by consumers. Stale data renders honestly: "data as of {date}, refresh pending."

Sources

Started with EPA ECHO Exporter (weekly). Follow-on lanes: FMCSA MOTUS, DOL Form 5500 bulk, USAspending.