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Latest from Protos Systems

Product updates, technical notes, and announcements about Arche and deterministic financial data infrastructure.

Thursday, March 5, 2026
Kevin Downey

How Arche Handles Financial Restatements

Arche preserves filing lineage during restatements so historical analysis stays reproducible and point-in-time correct.

Category: Engineering

SourcesRaw filings and corrections become versioned eventsEDGAR filingsAccessioned, timestampedAmendments / restatementsNew versions, never overwritesProvider correctionsExplicit change eventsVersioned ledgerImmutable versions with provenanceStatement: AAPL • 2024-12-31source=edgar • accession=0000320193-25-000010version=v3 • ingested_at=2025-02-05T02:14:31Zprovenance: strongVersions over timev1v2v3Contract-first APIVersioned routes, machine-readable schemasGET /v1/…Deterministic orderingExplicit paginationCanonical error envelopesStable schema contractsReady for MCP tool usemcp