Evidence row 1791813

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.artefaktum.dev/v1/artifacts/by-external-key/smoke/20261031223716"
    ]
  ],
  "name": "Artefaktum",
  "owner_address": "0xeccc9f03eb79c6a5b0fbd919f95656557e6a6173",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0xeccc9f03eb79c6a5b0fbd919f95656557e6a6173",
        "scheme": "exact"
      }
    ],
    "description": "Look up an artifact by the external_key it was stored under (your own name for it, slashes allowed), in one of the wallet's projects. max_age_seconds turns an artifact older than that into a 404, for caching. Returns the artifact. Costs $0.005 in USDC. No signup: a wallet's first payment creates its account and a default project; the same wallet later reaches the same files.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "pathParams": {
              "external_key": "smoke/20261031223716"
            },
            "queryParams": {
              "project_id": "019a3a10-0c3e-7c4e-9a51-2f6d8e1b4c70"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "created_at": "2026-10-31T09:30:00Z",
              "created_by": "wallet:0x857b06519e91e3a54538791bdbb0e22373e36b66",
              "description": "Quarterly revenue by region",
              "expires_at": "2026-11-30T09:30:00Z",
              "external_key": "reports/2026-q3",
              "id": "019a3a12-5b7d-7f21-8e3a-6c4b2d9f0a18",
              "latest_version": {
                "content_type": "application/pdf",
                "created_at": "2026-10-31T09:30:00Z",
                "etag": "9b2cf535f27731c974343645a3985328",
                "id": "019a3a12-5b7e-7a90-b1c2-3d4e5f6a7b8c",
                "original_filename": "q3-report.pdf",
                "sha256": "4f8b42c22dd3729b519ba6f68d2da7cc5b2d606d05daed5ad5128cc03e6c6358",
                "size_bytes": 482133,
                "status": "ready",
                "version_number": 1
              },
              "metadata": {
                "source": "agent"
              },
              "project_id": "019a3a10-0c3e-7c4e-9a51-2f6d8e1b4c70",
              "semantic_ready": true,
              "stale_upstream": false,
              "status": "ready",
              "superseded": false,
              "superseded_by": null,
              "tags": [
                "finance",
                "q3"
              ],
              "title": "Q3 revenue report",
              "updated_at": "2026-10-31T09:30:00Z"
            },
            "type": "json"
          }
        },
        "routeTemplate": "/v1/artifacts/by-external-key/:external_key",
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "additionalProperties": false,
                  "properties": {
                    "external_key": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "external_key"
                  ],
                  "type": "object"
                },
                "queryParams": {
                  "properties": {
                    "max_age_seconds": {
                      "type": "string"
                    },
                    "project_id": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "project_id"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "pathParams"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793456363/bazaar-icons/804f62358cb25a27.png",
    "lastUpdated": "2026-10-31T22:37:27.341Z",
    "quality": {
      "l30DaysTotalCalls": 0,
      "l30DaysUniquePayers": 0,
      "lastCalledAt": "2026-10-31T22:37:27.341Z"
    },
    "resource": "https://api.artefaktum.dev/v1/artifacts/by-external-key/smoke/20261031223716",
    "serviceName": "Artefaktum",
    "tags": [
      "storage",
      "artifacts",
      "files",
      "search",
      "agents"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Look up an artifact by the external_key it was stored under (your own name for it, slashes allowed), in one of the wallet's projects. max_age_seconds turns an artifact older than that into a 404, for caching. Returns the artifact. Costs $0.005 in USDC. No signup: a wallet's first payment creates its account and a default project; the same wallet later reaches the same files."
}

What the leaf hashes

{"body":"1812794cd9a61ffef4479832c825380c929ea20cae4c206bd9f9a15a77009d61","id":1791813,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793559993814122,"prev":null,"subject":"x402_bazaar:https://api.artefaktum.dev/v1/artifacts/by-external-key/smoke/20261031223716","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0x95242d33f697baa0842e20ed0464ff1f8e0b3ed6ca8ce68aa4c39ddb5fb05f8c
2. 0xb78c599750599e4719140bfdf87e9a9b5cb0c5b6ab077c19cbf3109ac15826d6
3. 0x26bde2d7e70385386a4de13d5be79e4e8f69453146e62d74e28f32af953eb8d6
4. 0x5c67e42f057938928c1101eb721825da497002953d2af973d9a01a85bf6573c0
5. 0x5093f1fcf0df80d2cf178e12e4ed30ac48a1d239747be0eb8be0706dd213667a
6. 0xa00e6cd5d7ea78b202781f4397468d65ec49a9882fb6ac2d04fb7c66ccbbdb81
7. 0x9eb3d2ef5741124166cd70320dd4383d93d29b730229ece201f3e976314a3e3b
8. 0x32c85fe837e37994726b41b9de0b45095736e05e8c83602d389b33619dd98ec6
9. 0xf971b98a02e2e9f6aa586b1dbb20a7bad409c97cabd93190818b7adb059e3d17
10. 0xfd990903d338274181398f33ac04fe7d3fe7d8c6f753ec3cb54fd695cc93c912
11. 0xd1761958f2cbddd7e650a2d32e56856b2d52434fd4ce674e3ff460f83067714e
12. 0x2d76de07fb4f2c0f7b2953b9a36f171939b03a20857dec65366475f1ac8d8a45
13. 0x5fa48d4b29f08942a71ddc94700c9e76269811b21fe904993da8011a51962f43
14. 0x4a947b63bd24ff0fe59b3ababead63ec46e4f0a77216d7b01b8bdbc5c7c01e63
15. 0x23107b06227fe01d939429fa5248f5555093c421dfc6b8bc6ba3518a65263d17
16. 0xc2b1c84ef3531511a3d8d9db5ff9eeca2725a3782e7f9c4ac87fc0f1588349fa
17. 0x0c618c42b286ad61acd8204aa6dcf024b8b041d3759aa585bf4e221abc39cb5d
18. 0x6142ac48fda269c17791c79da99c2456ac6acfe98268f4d168a404fd6040c703
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90