Evidence row 76244

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": "2026-10-25T18:34:31.591Z",
    "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":"4b5390c429ba97a859e23fd786b6180b6c075e87b73bc7c9dcaa8fe925f24c13","id":76244,"kind":"listing","method":"baseline/1","observed_us":1793025491847114,"prev":null,"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. 0xb69a19ddf4d9132a616fbe77f41896879d796cd162c791b5b77e540634c30235
2. 0x2ad85cb9f7516e5dfd8678da39114c3928987bb15be8b0dd42a6928e228fa168
3. 0xb5bede7a1e7dc0e5bdc14277ce100f46f187c0091646343bd91aae2b958705fc
4. 0x3dcb70baaafe34bda51ec9682fee4b3d32682b9849242c8864cf3264b7f096ec
5. 0xb8987db3eb599ea556a38e1d615bc2a06e6d76064130fe89c1c0effde84d3721
6. 0x414446eee029a162dac8e94c67ecf97d00cc3b9596a823a273c3d947e44dc583
7. 0xe84380d72bd1d5eabf276d4fa9ea6a84f8c63d65cefc3c0f9ebfecb9f3930461
8. 0xa71cbc3cf1bc63dc316d2c7554faaf1d4f1adc36e0adf65be0b0ba0144015010
9. 0xac70c610cf2e95d6b8db9d955539167caf1f5581be2689ce628dab8aab8c6cb4
10. 0x8ad504c3df28b2abf4893577952a0655be9d4e70ea34ee4e1147dc0aa281fdd2
11. 0xfa91c460bb9b05b6890b46e5326a89c9e487b6419bd4d84337c05040222a2e6c
12. 0x17930d484cab3f6850715eb0b77dd189c3c06f975cf9def12285fde3eb9b4234
13. 0x0d86419ca1dd0b62fd8b22ea2e8c74d441312cec3116a467bea429b43e026565
14. 0x083427e39db4dd470662401f6db5db8fadf084fc4274cf8621b368416952b78b
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae