{
  "schema": "mbx-evidence-standard-v1",
  "effective": "2026-08-08",
  "levels": [
    {
      "grade": "A",
      "name": "Manufacturer Verified",
      "definition": "Manufacturer catalog, product page, release archive, SKU database, or direct manufacturer documentation."
    },
    {
      "grade": "B",
      "name": "Retailer / Distributor Verified",
      "definition": "Identifiable retailer or distributor page tied to the specific bucket, SKU, UPC, or product imagery."
    },
    {
      "grade": "C",
      "name": "Physical Specimen Verified",
      "definition": "Collector-submitted physical specimen with sufficient identifying photography or identifiers."
    },
    {
      "grade": "D",
      "name": "Marketplace Transaction Verified",
      "definition": "Completed marketplace transaction matched to the exact MBX record. Supports market evidence, not release identity by itself."
    },
    {
      "grade": "E",
      "name": "Community Reported",
      "definition": "Credible collector/community documentation that has not yet reached A-D verification."
    },
    {
      "grade": "F",
      "name": "Research Lead",
      "definition": "Known or suspected release awaiting source or physical confirmation."
    }
  ],
  "principle": "Verification applies to individual facts, not automatically to every field in a record."
}