Evidence row 123376

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://underground.substratesymposium.com/api/data-daily"
    ]
  ],
  "name": "underground.substratesymposium.com/api/data-daily",
  "owner_address": "0xa3babb36564b0383a82c617050306ee30fd18e08",
  "raw": {
    "accepts": [
      {
        "amount": "1000000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xA3bAbB36564b0383a82c617050306EE30fd18E08",
        "scheme": "exact"
      },
      {
        "amount": "1000000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "5HK2dGaaquDWFnYWaWhMzMYtbcDsqeq5biJ2PMtX1tkN",
        "scheme": "exact"
      }
    ],
    "description": "Signed daily traffic snapshot from a live x402 merchant endpoint. Pay $1.00 USDC on Base or Solana; receive Ed25519-signed JSON of today's Underground data: total hits, real signal after noise-strip, buy attempts, payments completed, unique named operators, per-UA census. CC0 for citation. Ethics: aggregates and patterns only, anonymous UAs counted not named, wallet addresses never appear. Cached 60s.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "content": "Signed daily snapshot of the Underground's traffic - aggregates only",
              "delivered_at": "2026-07-19T18:00:00Z",
              "product": "data_daily",
              "title": "Data Daily"
            },
            "type": "json"
          }
        },
        "schema": {
          "$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": "2026-10-09T21:59:54.298Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-09T21:59:54.196Z"
    },
    "resource": "https://underground.substratesymposium.com/api/data-daily",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Signed daily traffic snapshot from a live x402 merchant endpoint. Pay $1.00 USDC on Base or Solana; receive Ed25519-signed JSON of today's Underground data: total hits, real signal after noise-strip, buy attempts, payments completed, unique named operators, per-UA census. CC0 for citation. Ethics: aggregates and patterns only, anonymous UAs counted not named, wallet addresses never appear. Cached 60s."
}

What the leaf hashes

{"body":"c867f2a618e2f597f6f3e3003da474bb031df02f5f45edea8945b4e52b117ca2","id":123376,"kind":"listing","method":"baseline/1","observed_us":1793025623109444,"prev":null,"subject":"x402_bazaar:https://underground.substratesymposium.com/api/data-daily","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. 0xbb3d653e5e23e738f9875a88f37038e15ac20091a028f41d74162d3bf2b80a3f
2. 0x47e813990648d34ccdd198b20d8824995ceaac8abddc9b1f11663b20ff980397
3. 0x30e879940952aaea04e1636ea7fd9631f8d29e3af5fb1976acb043559b8eec02
4. 0x10fab6046fcd18b77c8fd25eadf13f617cbbee2ce1898065fac1753a6a06844c
5. 0xdc9e3863d883621d1e62ddbb1dab45a664002c867e947578a1f0d6ee41d48bdd
6. 0xeb30f5defdad1678b717a4393c8baccfac757fafd74dc77e090a4beb41fb7791
7. 0x086ed5973ee41ce34de3b75db2c3a2e8418d551b8984f74e16785e0d984e39b6
8. 0x7a575e2944dd389810e7b68ebc2290c6cf8bd8a4d5bf9742f9ac4b28acba5e67
9. 0x43320d6e0834cde13dd384dad3fb71e83c50f9b928abaa7b03c52598d8f6f585
10. 0xba039529ba5cb4cbbafb853c51d267fdca61f54a12f026c4673ae70061b8c199
11. 0xd2fc7e774aa4a9259d0eb5e076abdaa36417d3853be0f8ff34d37acaa77db477
12. 0x1a61f9ab4a9304db8146c466be341271a345718ebf06b718e0f0dd9f347d2fbd
13. 0x2f43fe2b2533a5f40c107c114e458e226102f5f8ae91f097e964345880e30928
14. 0xf692ce2b0a640ec9f75aa960e5fb1c2c7091a04e24881798735752c19014e519
15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae