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Agency MBS4 min read

How MBS Data Reconciliation Works

Agency mortgage-backed securities pool data comes from several disclosure feeds that must reconcile before anything can safely settle.

Why agency MBS

Agency MBS is one of the largest fixed-income markets in the United States. Its pool-level data, such as factors, balances and security details, is published through the disclosure platforms of Fannie Mae, Freddie Mac and Ginnie Mae. Each platform publishes its own raw data. None reconciles against the others or offers a defined dispute path.

For a tokenized pool or a settlement that depends on that data, the stakes are practical: a stale or mismatched figure means a wrong value, a failed settlement or an audit question later. If an attestation layer works against this much nuance, it can be applied to simpler cases.

The mechanism, step by step

  1. 1.Source ingestion. OWNR pulls data from multiple authoritative sources. A defined hierarchy ranks them for each asset class.
  2. 2.Cross-validation. The sources are compared against each other. Agreement within tolerance moves a claim forward.
  3. 3.Dispute logic. When sources disagree, or data is stale, the claim halts and routes to a defined resolution path. Disagreement is never resolved silently.
  4. 4.Signing. The validated record is signed cryptographically. Post-quantum signing is in development.
  5. 5.Publication. A timestamped, immutable record is written onchain.
  6. 6.Independent verification. Any party, using a verification tool separate from the publisher, can confirm the signature and the audit trail.

How outcomes look

  • ScenarioSources agree within tolerance

    What happensThe claim is validated, signed and published as an attestation

  • ScenarioSources conflict

    What happensThe claim halts and routes to the defined dispute path. Nothing is published as valid

  • ScenarioData is stale

    What happensThe claim is rejected, with the reason recorded

  • ScenarioA third party checks a record

    What happensThe verifier confirms the signature and audit trail without relying on OWNR's live system

What the pilot demonstrates

  • Multi-source validation. Pool-level data ingested from several disclosure feeds, ranked by a defined source hierarchy and cross-checked within tolerance.
  • A visible rejection path. What happens when sources conflict or data is stale: the claim stops, the reason is recorded, and nothing is published as valid.
  • Signed, published records. Each validated claim is signed and written as a timestamped onchain record.
  • Independent verification. A separate verification interface, run apart from the publisher, confirms any record.
  • Configurable rules. Source hierarchy and dispute rules are set per asset class, not hardcoded to MBS.

See the pilot

Data you can defend, and anyone can check.