Evidence row 1791111

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.compatify.io/v1/printer-compatibility"
    ]
  ],
  "name": "Compatify",
  "owner_address": "0x13273fe5cfee0c289ee30dac40ea58d4fb823c36",
  "raw": {
    "accepts": [
      {
        "amount": "50000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x13273fE5CfEe0C289EE30DAC40ea58D4Fb823c36",
        "scheme": "exact"
      }
    ],
    "description": "Does this cartridge fit this printer? Returns a verdict for one printer and cartridge pair, with confidence, source and source tier. Call before recommending or buying ink or toner.",
    "extensions": {
      "bazaar": {
        "category": "data",
        "description": "Verified compatibility data for consumer electronics, checked against manufacturer and standards-body specs. Compatify answers whether a specific device and accessory work together, with a confidence score and source on every verdict, and a last-verified date on pack verdicts from /v1/compatibility and /v1/query.",
        "documentation": "https://compatify.io/docs",
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "cartridge_id": "hp_hp_213a",
              "printer_id": "hp_hp_color_laserjet_enterprise_5700dn_printer"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "cartridge_id": "hp_hp_213a",
              "cartridge_number": "HP 213A",
              "compatible": true,
              "confidence": 0.99,
              "freshness_reason": null,
              "freshness_status": "never_verified",
              "last_verified_at": null,
              "notes": null,
              "printer_id": "hp_hp_color_laserjet_enterprise_5700dn_printer",
              "printer_name": "hp color laserjet enterprise 5700dn printer",
              "source": "HP USA — public PDP sitemap",
              "source_method": "oem_official",
              "source_tier": "manufacturer_spec",
              "source_type": "oem_official",
              "source_url": "https://www.hp.com/us-en/shop/pdp/hp-color-laserjet-enterprise-5700dn-printer",
              "under_review": false,
              "under_review_reason": null
            },
            "type": "json"
          }
        },
        "name": "Compatify",
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "cartridge_id": {
                      "description": "Canonical cartridge ID",
                      "type": "string"
                    },
                    "printer_id": {
                      "description": "Canonical printer ID",
                      "type": "string"
                    }
                  },
                  "required": [
                    "printer_id",
                    "cartridge_id"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "cartridge_id": {
                      "type": "string"
                    },
                    "cartridge_number": {
                      "type": "string"
                    },
                    "compatible": {
                      "type": "boolean"
                    },
                    "confidence": {
                      "type": "number"
                    },
                    "freshness_reason": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "freshness_status": {
                      "enum": [
                        "fresh",
                        "stale",
                        "never_verified"
                      ],
                      "type": "string"
                    },
                    "last_verified_at": {
                      "description": "When the verdict was last re-checked against its sources; null until checked.",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "notes": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "printer_id": {
                      "type": "string"
                    },
                    "printer_name": {
                      "type": "string"
                    },
                    "source": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "source_method": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "source_tier": {
                      "description": "standards_body, manufacturer_spec, verified_retailer_listing or unverified",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "source_type": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "source_url": {
                      "description": "Served to a paid or authenticated request only.",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "under_review": {
                      "type": "boolean"
                    },
                    "under_review_reason": {
                      "enum": [
                        "frozen",
                        "source_unavailable",
                        "record_flagged",
                        null
                      ],
                      "type": [
                        "string",
                        "null"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        },
        "serviceName": "Compatify",
        "tags": [
          "compatibility",
          "consumer-electronics",
          "accessories",
          "product-data",
          "verification",
          "shopping",
          "agent-commerce"
        ],
        "website": "https://compatify.io"
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793456832/bazaar-icons/b3db9eb70dffe829.png",
    "lastUpdated": "2026-10-31T14:27:11.616Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-31T14:27:11.332Z"
    },
    "resource": "https://api.compatify.io/v1/printer-compatibility",
    "serviceName": "Compatify",
    "tags": [
      "compatibility",
      "consumer-electronics",
      "accessories",
      "product-data",
      "verification"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Does this cartridge fit this printer? Returns a verdict for one printer and cartridge pair, with confidence, source and source tier. Call before recommending or buying ink or toner."
}

What the leaf hashes

{"body":"4fa044117f84a6ee40d3de345ab555669b15e95dd6a5e9fec0febc746a9d7e1d","id":1791111,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793559940310983,"prev":null,"subject":"x402_bazaar:https://api.compatify.io/v1/printer-compatibility","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. 0x197c08afcb188ba18c7442daa1a9122aba619092d35fba106a2afc1a413297bb
2. 0x7229f7bd882a8d79f9af77dd5597b6f5f4061a1c3bd42cc58a89dbb7647485e5
3. 0x90aeface5144f0f3968b81e2969c3eb2dc85a0441b30ed56e6af56dc70002a67
4. 0x757c620898a15f135332eb400379a8243fde7e1147b76e37e204514f783a1c35
5. 0x6a4f6cc3430e5a412e292e88ea2239d053c8e9ec8f71b54d9c181347062c10d5
6. 0x1eb4553e5b3cacec10836897ed91cb1835182013edf81e9fa1902aa948010d74
7. 0xae9f3199be6b6dc0765402c81174e864837726d2483501ab22b1d9bddd64ab32
8. 0x5b2eeca23c689efa3736c453a602ddec9a6ccfe7ed9729a2c836247ef06e3ec5
9. 0xcf3157dec1580ea318eb935f6bf20c649897a4b6509c822b988e6906e9e3e188
10. 0x3fe17d1914d28e6ca0a20580fc4fbb8195d90bb90730770109c8a45743fec5c6
11. 0xa13c8381c50bd1518cf66729b12ef47f9789d527edeb8e94a155a6169f83788a
12. 0xbc87c436160871473fe1b25793d3a9e1f28feb14d3406224c45c430970d25db2
13. 0xe932a6d750c9158a9531e23362139f67f1dcf32cd64229987581f24d7a22fe71
14. 0xa4d26e861503b80bb91bc89e98fcc6daf0fcf003f5a144540ccd91637ccdc11f
15. 0xf1aed005f71411c0df252d9623f284bcac7de199e24c4d4cd5df3e8d3348d3aa
16. 0x5cf5a0a57795246f996e480f05ed085c19d02f7d6e8fc3ddc392412466554f0f
17. 0x02b3554752e71a19b12d7a76dbff436e85387226ceec89fdebdcdaf0122c2932
18. 0x1973893697931b7512ae5dc1a3c92ef92f633ae3574dce9029a35b5e94d2d364
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90