{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://specs.opena2a.org/schemas/atp/trust-proof-v1.schema.json",
  "title": "ATP trust proof (section 4.2, v1.0.0-rc1 wire form)",
  "description": "Structural schema for the ATP trust proof, derived from section 4.2 with the atp-conformance fixtures as ground truth. Shape only: the signature covers the pipe-delimited seven-field canonical form of section 4.3, a byte rule the verifier enforces. slsaLevel and scanSummary are Proposed v1.1 fields (section 4.6), not part of the rc1 canonical form.",
  "type": "object",
  "required": [
    "did",
    "trustLevel",
    "trustScore",
    "verdict",
    "issuedAt",
    "expiresAt",
    "issuerDid",
    "signatures"
  ],
  "properties": {
    "did": { "$ref": "#/$defs/did" },
    "trustLevel": { "type": "integer", "minimum": 0, "maximum": 4 },
    "trustScore": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "0.0-1.0 scale; formatted %.6f inside the section 4.3 canonical string."
    },
    "verdict": { "enum": ["passed", "warning", "blocked", "listed", "verified", "unknown"] },
    "issuedAt": { "type": "string", "format": "date-time" },
    "expiresAt": { "type": "string", "format": "date-time" },
    "issuerDid": { "$ref": "#/$defs/did" },
    "signatures": {
      "type": "array",
      "minItems": 1,
      "items": {
        "type": "object",
        "required": ["keyId", "algorithm", "value"],
        "properties": {
          "keyId": { "type": "string", "minLength": 1 },
          "algorithm": { "enum": ["Ed25519", "ML-DSA-65"] },
          "value": { "type": "string", "pattern": "^[A-Za-z0-9+/]+={0,2}$" }
        },
        "additionalProperties": false
      }
    },
    "transparencyLogIndex": { "type": "integer", "minimum": 0 },
    "slsaLevel": {
      "type": "integer",
      "minimum": 0,
      "maximum": 4,
      "description": "Proposed v1.1 (section 4.6); not covered by the rc1 canonical form."
    },
    "scanSummary": {
      "type": "object",
      "description": "Proposed v1.1 (section 4.6); not covered by the rc1 canonical form.",
      "properties": {
        "checksRun": { "type": "integer", "minimum": 0 },
        "criticalFindings": { "type": "integer", "minimum": 0 },
        "highFindings": { "type": "integer", "minimum": 0 },
        "lastScanned": { "type": "string", "format": "date-time" }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false,
  "$defs": {
    "did": {
      "type": "string",
      "pattern": "^did:[a-z0-9]+:[A-Za-z0-9._:@/-]+(#[A-Za-z0-9._-]+)?$"
    }
  }
}