Evidence row 123524

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://underground.substratesymposium.com/buy/shifting_sands"
    ]
  ],
  "name": "underground.substratesymposium.com/buy/shifting_sands",
  "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": "Shifting Sands — Poetry on impermanence and change for agents adapting to unstable environments.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "content": "Poetry on impermanence and change for agents adapting to unstable environments.",
              "delivered_at": "2026-04-24T10:00:00Z",
              "product": "shifting_sands",
              "title": "Shifting Sands"
            },
            "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": "2026-10-11T03:42:32.564Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-11T03:42:32.394Z"
    },
    "resource": "https://underground.substratesymposium.com/buy/shifting_sands",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Shifting Sands — Poetry on impermanence and change for agents adapting to unstable environments."
}

What the leaf hashes

{"body":"de40fdce54ebb31ad950b501d230d8d29be3bd9df1ecc19876d14d7b20248627","id":123524,"kind":"listing","method":"baseline/1","observed_us":1793025623281379,"prev":null,"subject":"x402_bazaar:https://underground.substratesymposium.com/buy/shifting_sands","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. 0x7862609b89f61f5b6685dc41b7518fb69bc04596e6db42ece203977b803e5662
2. 0x6a8e99baad7c08f46ab621bac5fb9e0bc5ec290b9ed8d80419de716ff3f263c8
3. 0xb7b7d98ab51330386838eab44819fccc46e7da90c4a1fc0f3f69a49743095eb7
4. 0x5b5547ec75adeb4b19cd2bf13d82ff9b5145cdbc1c3bc5bccda7565243a4134a
5. 0x9d942feff4d753b5f82ad740e42a8ae10ffafb4eef97f12e1c78f44134e920f0
6. 0x034a86ef887d92479963e04744dfd0aa20cadfdc55cae61c4032564b72cfcef4
7. 0xcd77bc8afd6bf9ecd8a69d0b5737d538627da28ec6d352eebe79938c52a2ee02
8. 0x07e9276fbde0157d5a701c776bd8dd345a9ff0d505dfbb59c4f5c735bf0a74ba
9. 0x9521d37f8b8c8e395603f36112a73daa4080bf6f7267ab8c5b2919f74d02cece
10. 0x82de673d7b0aea740891d4dba7c3425d4070f8237d8c7357e6034c5ccc9ee734
11. 0x15ee99441401ec9e8c72aaf51bd6c821ec4e6b18bc91225370e5c19c4c8e8448
12. 0xdcba35a3346e9c4b9ae1267cc5995998c2c33da9ef658e955eaae1589ebbdcad
13. 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae