Evidence row 261454

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://headlessoracle.com/v5/status/x402"
    ]
  ],
  "name": "headlessoracle.com/v5/status/x402",
  "owner_address": "0x26d4ffe98017d2f160e2daae9d119e3d8b860ad3",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x26D4Ffe98017D2f160E2dAaE9d119e3d8b860AD3",
        "scheme": "exact"
      }
    ],
    "description": "Signed market-state receipt for one exchange. OPEN/CLOSED/HALTED/UNKNOWN - Ed25519 signed, 60s TTL.",
    "extensions": {
      "bazaar": {
        "info": {
          "category": "financial-data",
          "description": "Ed25519-signed market-state receipt for one of 28 global exchanges. Pre-trade verification gate for autonomous financial agents. UNKNOWN = CLOSED (fail-closed). 60-second TTL. Holiday-aware, DST-correct, real-time halt detection for XNAS and XNYS only; schedule-based for the other 26.",
          "documentationUrl": "https://headlessoracle.com/docs",
          "exampleNote": "output.example is a real receipt captured 2026-06-05T16:03:15Z. Its Ed25519 signature verifies against key_2026_v1 published at /v5/keys (now expired by TTL - schema-illustrative).",
          "family": "market-state",
          "input": {
            "method": "GET",
            "queryParams": {
              "mic": "XNYS"
            },
            "type": "http"
          },
          "metadataUrl": "https://headlessoracle.com/.well-known/mcp/server-card.json",
          "output": {
            "example": {
              "expires_at": "2026-06-05T16:04:15.257Z",
              "halt_detection": "active",
              "issued_at": "2026-06-05T16:03:15.257Z",
              "issuer": "headlessoracle.com",
              "mic": "XNYS",
              "public_key_id": "key_2026_v1",
              "receipt_id": "eb2a23e4-c3cc-49dc-aa1e-e443eb89045e",
              "receipt_mode": "live",
              "schema_version": "v5.0",
              "signature": "ab5413710ca2c4b71a5241efe3be386b6e2d3e1746deb1686e42c2f718cdb76e6e4e5a077817c972e8c1c04a301da5465b147b533fc1e4505523f81d35b98901",
              "source": "SCHEDULE",
              "status": "OPEN"
            },
            "format": "application/json",
            "type": "json"
          },
          "pricingUrl": "https://headlessoracle.com/v5/pricing",
          "tags": [
            "market-state",
            "exchange-status",
            "pre-trade",
            "attestation",
            "Ed25519",
            "trading-hours",
            "holiday-calendar",
            "fail-closed",
            "28-exchanges",
            "signed-receipt",
            "MIC",
            "ISO-10383"
          ]
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ]
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "mic": {
                      "description": "ISO 10383 Market Identifier Code",
                      "enum": [
                        "XNYS",
                        "XNAS",
                        "XLON",
                        "XJPX",
                        "XPAR",
                        "XHKG",
                        "XSES",
                        "XASX",
                        "XBOM",
                        "XNSE",
                        "XSHG",
                        "XSHE",
                        "XKRX",
                        "XJSE",
                        "XBSP",
                        "XSWX",
                        "XMIL",
                        "XIST",
                        "XSAU",
                        "XDFM",
                        "XNZE",
                        "XHEL",
                        "XSTO",
                        "XCBT",
                        "XNYM",
                        "XCBO",
                        "XCOI",
                        "XBIN"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "mic"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method",
                "queryParams"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "coverage": {
                      "description": "JSON-encoded string inside the signed bytes; JSON.parse it after verifying the signature. Added to the signed payload by commit 19ccb28 (2026-09-07); the example below predates it.",
                      "type": "string"
                    },
                    "expires_at": {
                      "description": "issued_at + 60s. Signed into the canonical payload - consumers must reject expired receipts.",
                      "format": "date-time",
                      "type": "string"
                    },
                    "halt_detection": {
                      "enum": [
                        "active",
                        "schedule_only"
                      ]
                    },
                    "issued_at": {
                      "format": "date-time",
                      "type": "string"
                    },
                    "issuer": {
                      "const": "headlessoracle.com"
                    },
                    "mic": {
                      "description": "ISO 10383 Market Identifier Code",
                      "type": "string"
                    },
                    "public_key_id": {
                      "description": "Active key ID published at /v5/keys",
                      "type": "string"
                    },
                    "receipt_id": {
                      "format": "uuid",
                      "type": "string"
                    },
                    "receipt_mode": {
                      "enum": [
                        "demo",
                        "live"
                      ]
                    },
                    "schema_version": {
                      "const": "v5.0"
                    },
                    "signature": {
                      "description": "Ed25519 signature over canonical (alphabetical, no-whitespace) JSON of the payload, hex-encoded.",
                      "pattern": "^[0-9a-f]{128}$",
                      "type": "string"
                    },
                    "source": {
                      "enum": [
                        "SCHEDULE",
                        "OVERRIDE",
                        "SYSTEM",
                        "REALTIME"
                      ]
                    },
                    "status": {
                      "description": "UNKNOWN must be treated as CLOSED (fail-closed contract).",
                      "enum": [
                        "OPEN",
                        "CLOSED",
                        "HALTED",
                        "UNKNOWN"
                      ]
                    }
                  },
                  "required": [
                    "receipt_id",
                    "issued_at",
                    "expires_at",
                    "issuer",
                    "mic",
                    "status",
                    "source",
                    "halt_detection",
                    "receipt_mode",
                    "schema_version",
                    "public_key_id",
                    "signature"
                  ],
                  "type": "object"
                },
                "format": {
                  "const": "application/json"
                },
                "type": {
                  "const": "json"
                }
              },
              "required": [
                "type",
                "example"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-26T15:38:53.792Z",
    "quality": {
      "l30DaysTotalCalls": 14,
      "l30DaysUniquePayers": 8,
      "lastCalledAt": "2026-10-25T18:34:31.297Z"
    },
    "resource": "https://headlessoracle.com/v5/status/x402",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Signed market-state receipt for one exchange. OPEN/CLOSED/HALTED/UNKNOWN - Ed25519 signed, 60s TTL."
}

What the leaf hashes

{"body":"8195232ac9773184aa4b44ee99bd8422039f75b9a975cf92ad6cb9e5c5a0238f","id":261454,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793032200263063,"prev":76244,"subject":"x402_bazaar:https://headlessoracle.com/v5/status/x402","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x6d86b1cd106fb3de53b54c748224864a60ab0a1a716421f8596084a878b99c86
2. 0x3204d0d5b5a21fe7b13949850bccf16ea5986637d36d507b62377c23261dc554
3. 0xb2c03641b0ac601c185dc2fad03f75289df4d2c62fadd903be4f167d3293e266
4. 0xc0573a37302ad330b1777f4c6baa8ef9a93c556c6a9a31cc364d4c7f43d44c03
5. 0x57f4cd862540325fc9aacb50fb3d474942ccfd0e5b030fce9b44d980251ff860
6. 0xb901a9de791df1f9eab9f7c9171aef779f79db7664feefa9eb9b8ef7f7cd0513
7. 0xc336a30a05b2fe0a2bbadb94093717f75de9864f43be9581fb7f5932b1b19b97
8. 0x4873a57a6faa91626104adfce665f79879f8eea2f59fcc39e77d709d4da1bdd1
9. 0x187cd02fc25d83259144a0d1b67cedaf83d9da8a9bc14e7630ca58c5be1f6be9
10. 0xd436881f2f0c7eba4a0a8b847ff798d53394f793d9cffd7bdf04f6a3d5c2f8be
11. 0x82b0a13483194285c0c386d5ad47eb953493b28955a9a8e58da3a2e6e220ed30
12. 0x929b3f59cbf01edbae456522161805dd51e098dc3a66d845508de46581bb953c
13. 0x9dc4d6f64bc3c323d2c45a28209068cd473b6979bd632a0d694bf94d19bc39df
14. 0xfc9b5a81a7a83a1c735a4fe64590beb9db14d2366f463161358af28c3ea9a81d
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae