Evidence row 72788

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://creator.halowerk.com/v1/ad-placement-opt"
    ]
  ],
  "name": "HALOWERK creatorwerk",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "asset": "USDC",
          "assetTransferMethod": "eip3009",
          "eip712Domain": {
            "chainId": 8453,
            "name": "USD Coin",
            "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "version": "2"
          },
          "name": "USD Coin",
          "network_name": "Base Mainnet",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "scheme": "exact"
      }
    ],
    "description": "Sorts caller-supplied placement opportunities by end time and solves the weighted non-overlapping interval problem exactly with dynamic programming. It does not buy inventory, predict conversion, enforce platform policy, model audience harm or guarantee campaign performance.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "bodyType": "json",
            "exampleUrl": "https://creator.halowerk.com/v1/ad-placement-opt/schema#/requestExample",
            "method": "POST",
            "schemaUrl": "https://creator.halowerk.com/v1/ad-placement-opt/schema#/inputSchema",
            "type": "http"
          },
          "output": {
            "example": {
              "candidate_count": 4,
              "method": "weighted interval scheduling by dynamic programming",
              "scope": "non_overlapping_interval_value_optimization_only_no_inventory_purchase",
              "selected_ids": [
                "mid-roll-b",
                "mid-roll-c"
              ],
              "selected_placements": [
                {
                  "end": 28,
                  "id": "mid-roll-b",
                  "start": 12,
                  "value": 55
                },
                {
                  "end": 42,
                  "id": "mid-roll-c",
                  "start": 28,
                  "value": 38
                }
              ],
              "total_value": 93
            },
            "exampleUrl": "https://creator.halowerk.com/v1/ad-placement-opt/schema#/outputExample",
            "schemaUrl": "https://creator.halowerk.com/v1/ad-placement-opt/schema#/outputSchema",
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": true,
          "properties": {
            "input": {
              "additionalProperties": true,
              "properties": {
                "bodyType": {
                  "const": "json"
                },
                "exampleUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "method": {
                  "const": "POST"
                },
                "schemaUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType"
              ],
              "type": "object"
            },
            "output": {
              "additionalProperties": true,
              "properties": {
                "exampleUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "schemaUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "type": {
                  "const": "json"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T18:34:52.352Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-25T18:34:51.931Z"
    },
    "resource": "https://creator.halowerk.com/v1/ad-placement-opt",
    "serviceName": "HALOWERK creatorwerk",
    "tags": [
      "iot",
      "advertising",
      "scheduling"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Sorts caller-supplied placement opportunities by end time and solves the weighted non-overlapping interval problem exactly with dynamic programming. It does not buy inventory, predict conversion, enforce platform policy, model audience harm or guarantee campaign performance."
}

What the leaf hashes

{"body":"7bf0d9f58024656c9f40c924fccf486cb86c903e33c3aa13faa8c9b0c803513c","id":72788,"kind":"listing","method":"baseline/1","observed_us":1793025486488027,"prev":null,"subject":"x402_bazaar:https://creator.halowerk.com/v1/ad-placement-opt","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. 0xf53279c7ea7804e1b2786fb5e7f97688c430364fb9ef238ddda8ddc4adf84d53
2. 0x215fa3cd44fffbe626eb221003f5373528fcbb7df6ab2841d38f8bdf012281c2
3. 0x06bb2fde62032b8e7fcf84ea96dc1a3826c87f9354935d7b00c6eb32a70d056a
4. 0x5a987860c005e1848ee1e00c70486079ec8a35c3d35c714130fb9e40ad35c1dd
5. 0x69f8a0244fc9e8ad1a06e7e3f90e7b0e59402f24f7de3b8e1a266862a5c63421
6. 0x363b68451f28881adfc24e0d55d53af898c0f825ad0436ca946b2ccade574cb5
7. 0x41106508ec4317123beb4bfb42fcd7ef9a89d7e371dfedfb075c54c8d89f26ae
8. 0x26f07f0af4c8911df13cb157ee560f9e1ce16c07dd41975c492712e6680d048f
9. 0x3d82e9ada7c7d17c361b62c6ce33f9647e7db0d1c163d3a3aa6538d4c298b9bd
10. 0xf7bdc34efb83dc5cbbcb5071558fe87a477728e005b9d180c492e090371b2357
11. 0xd1f6cbd0d3ee44ebe2e23b42e7f1822bbdf0afd342375323b5d4f8bc89cd943a
12. 0x86ae35463d854f3938d986999aa8497e14f0ba2aa6f39a269e1e6d1134f9b847
13. 0x79695e4356ea25a2b58265a824698704cd2c743099ce2dca9e41384ce8f1a8c5
14. 0xd769d41500075835c3b2f9184d223699fb983fd05c29fbcb44d964abc7ee380d
15. 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae