Brief Receipt

78c8d40e-eb8b-4619-9975-e860e209c347

Ed25519 signature Valid

Signed by published key Yes

All sources live (200) Yes

Attested facts

Content hash (SHA-256)	d4141d36e07747d11ea016f4a71660876c7516923bf7d8d39670aa8a22758566
Model	claude-sonnet-4-6 · 2026-06-19
Generated at	2026-06-21T12:43:07.065+00:00
Public key	49326fb2fc3e4361a67037bea7bc64aeb8819c38ea169c560089222e719a2c62

Cited sources — live status

Source	At signing	Now
https://www.bea.gov/data/gdp/gross-domestic-product	200	200 OK
https://fred.stlouisfed.org/graph/fredgraph.csv?id=GDPC1	200	200 OK

Raw signed payload & signature

signature: 76bba0dcf63ee5af005be47c00727f8f9299e3cb3b5099cef9f66b02b0db2d3667188dff20fb4ba5e4363937bedebea662d84432c2097ce5db3c56b397f19b01

{
  "v": 1,
  "model": {
    "id": "claude-sonnet-4-6",
    "version": "2026-06-19"
  },
  "sources": [
    {
      "url": "https://www.bea.gov/data/gdp/gross-domestic-product",
      "status": 200,
      "checked_at": "2026-06-21T12:43:06.153Z"
    },
    {
      "url": "https://fred.stlouisfed.org/graph/fredgraph.csv?id=GDPC1",
      "status": 200,
      "checked_at": "2026-06-21T12:43:06.153Z"
    }
  ],
  "content_hash": "d4141d36e07747d11ea016f4a71660876c7516923bf7d8d39670aa8a22758566",
  "generated_at": "2026-06-21T12:43:07.065Z"
}

Re-verify independently with the published key at /.well-known/kitalpha-provenance.json. Learn how this works on the provenance page.

Voluntary transparency aligned with the spirit of EU AI Act Article 50 (transparency obligations for AI-generated content, applying 2 August 2026). This is trust infrastructure and general information only — not a legal-compliance claim and not legal advice.