{
  "instrument": "EIP-712 typed structured data, secp256k1 signature (EVM-canonical, ecrecover-verifiable)",
  "as_above_so_below": "every field shown on the page is a committed field of the signed message; the digest moves if any of them change",
  "domain": {
    "name": "Planisphere",
    "version": "1",
    "chainId": 1,
    "salt": "0xb925df4ab950ebc4629e89906422a0ba1282d08cafb284b7daf46e3d97e6a4d6"
  },
  "types": {
    "Attestation": [
      {
        "name": "document",
        "type": "string"
      },
      {
        "name": "signer",
        "type": "string"
      },
      {
        "name": "room",
        "type": "string"
      },
      {
        "name": "pages",
        "type": "uint256"
      },
      {
        "name": "documentHash",
        "type": "bytes32"
      },
      {
        "name": "sealHash",
        "type": "bytes32"
      },
      {
        "name": "timestamp",
        "type": "uint256"
      }
    ]
  },
  "message": {
    "document": "Shadow & Mirror: Treewidth as the Universal Meter of Computation, Physics, and Consciousness",
    "signer": "Logan Christopher Ross",
    "room": "137",
    "pages": 895,
    "documentHash": "0x1c64a446d7522f1be4677332aa93745c41a3bdd33831ebd61002197f0a1f5711",
    "sealHash": "0x52bc2a0642988d9c18b48557a0eb13a4265c3ed038c7e04a260473af13608d6a",
    "timestamp": 1780272000
  },
  "digest": "0x817a8a6beb17a36c84ee2d7fd2e36a0670246164dec8d059bc6b387f718ce4d8",
  "signature": "0xcc0cbd770df9cb6e10d687539f218900812c250efb44c81f95e86161e98e5e034d4ff0924025f852d9f69ed2bdd9d7be2eafd72f3c9146cfe3f14d1cb1dedf6c1c",
  "signer_address": "0xf348EE07BAe8dB1246342fECc8A16B0eC08cc93f",
  "key_origin": "derived-dev",
  "file_sha256": {
    "thesis.pdf": "c6529c075d5dedc7bc005ce26d3dc5b1a8ce37d60c843e72203e2bd5fc87b20e",
    "seal.svg": "f140946418b20d07bcdda7ab858d1f1bfe1449b65c840b3ca97662a722019f70"
  },
  "verify": "eth_account.Account.recover_message(encode_typed_data(domain, types, message), signature=signature) == signer_address"
}