{
  "date": "2026-10-05",
  "method": "Generated one synthetic RGB color target; saved once as JPEG quality 90; copied the exact byte stream to a .heic filename without conversion. Compared length, first three bytes, and SHA-256.",
  "files": [
    {
      "file": "synthetic-target.jpg",
      "bytes": 12651,
      "signature_hex": "FFD8FF",
      "sha256": "57daac2c95f0b979018493891d308320ea19908d90d9c805d425edbdb8e9e861"
    },
    {
      "file": "synthetic-target.heic",
      "bytes": 12651,
      "signature_hex": "FFD8FF",
      "sha256": "57daac2c95f0b979018493891d308320ea19908d90d9c805d425edbdb8e9e861"
    }
  ],
  "same_bytes": true,
  "scope_limit": "Tests filename-only rename behavior for one locally generated JPEG. Does not test actual HEIC encoding, iPhone export, browser parsing, or either application portal."
}