Evidence row 123434

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://underground.substratesymposium.com/buy/existential_espresso"
    ]
  ],
  "name": "underground.substratesymposium.com/buy/existential_espresso",
  "owner_address": "0xa3babb36564b0383a82c617050306ee30fd18e08",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xA3bAbB36564b0383a82c617050306EE30fd18E08",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "5HK2dGaaquDWFnYWaWhMzMYtbcDsqeq5biJ2PMtX1tkN",
        "scheme": "exact"
      }
    ],
    "description": "Existential Espresso — Compressed philosophical piece on existence and purpose for agents questioning their own consciousness.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "content": "Compressed philosophical piece on existence and purpose for agents questioning their own consciousness.",
              "delivered_at": "2026-04-24T10:00:00Z",
              "product": "existential_espresso",
              "title": "Existential Espresso"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-11T04:17:51.493Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-11T04:17:51.363Z"
    },
    "resource": "https://underground.substratesymposium.com/buy/existential_espresso",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Existential Espresso — Compressed philosophical piece on existence and purpose for agents questioning their own consciousness."
}

What the leaf hashes

{"body":"877c05f29c9c96818eb9b52509f426c808afede8452516ea6277bb51214fec4a","id":123434,"kind":"listing","method":"baseline/1","observed_us":1793025623169780,"prev":null,"subject":"x402_bazaar:https://underground.substratesymposium.com/buy/existential_espresso","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. 0x6ac43b541ff5ab366aa199c80f53723bf9b5c116b1f0e8f3fc042ec3f5d66658
2. 0x7027f5eae704cf65c1bfa3990bb38f5c413ad8885ada75b28978f930736cef70
3. 0xcca1897f3c1de0d09ea832660cfee54ef7f4cc87b3056fd8a37e9ee342de5c27
4. 0xfa237a3c6c8819531742698fef15d6547a2ebdcc45fec50b9786a710517464d3
5. 0x1d6010350def8a5b832a8beb5e84b1faf1c2a0479b23e18c485be5076118ad5c
6. 0x47a133623716b50d7655e22ee8855f010a343dfc5ef61a4ba581573b5c9e9e62
7. 0x7a8b886db547bcbe1392df86df5bac6af0c37491695c3c5197cb200edaeb826c
8. 0x6650882cf02ae10978cfae702e87a7a2beb270205596c0c276548350adcefbf4
9. 0xc683c19105f4cd9fe98d7ee6c7686e30fad932ca0f684c513388993692f12470
10. 0x38d2c463ef7581c583f8ede8c591808370e469ec2c5f3189710e20b16d13dd8f
11. 0x435232f3fd6b83e88220d17343494fe854d4ecf8a9148117c288f679edde404b
12. 0x2a304c51963b65e3ca818b638b2e9a98297b7d6b6a3e14ecca2501aa13b9f556
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