Evidence row 236172

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.losbeto.xyz/chain-block"
    ]
  ],
  "name": "Losbeto Market Intelligence",
  "owner_address": "0xd5ba9711a3d052846a3695c70e7fcb8b3168fe7d",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "requestId": "9352e2da8198",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xd5Ba9711a3D052846a3695C70e7fcb8b3168FE7d",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww",
          "requestId": "9352e2da8198"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "GEhr9HCFTRDjanMg435frSgCVwVZYpNoPrEkmNBnFHFE",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "31566704",
        "extra": {
          "feePayer": "ZMFK2OI7ZBD2U27ISERZC4S6LKM6WMFJPZQ4MYNJDZ2VNBNMBA67RA22AA",
          "requestId": "9352e2da8198",
          "tag": "x402-global-challenge"
        },
        "maxTimeoutSeconds": 300,
        "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
        "payTo": "MRVA6OABPQJNJ2WFUHFY57FMJXHBV37IU665MXRJX4JYBIWGACP3LSDUF4",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "requestId": "9352e2da8198",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xd5Ba9711a3D052846a3695C70e7fcb8b3168FE7d",
        "scheme": "exact"
      }
    ],
    "description": "Current Base block number, timestamp, age and gas usage — the cheapest real chain read on this node. The 'hello world' of live chain data.",
    "extensions": {
      "bazaar": {
        "dataFreshness": {
          "cache_ttl_s": 60,
          "live_data": "≤3s from source",
          "preview_data": "≤15min delayed"
        },
        "description": "Current Base block number, timestamp, age and gas usage — the cheapest real chain read on this node. The 'hello world' of live chain data.",
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "type": "json"
          }
        },
        "inputSchema": {
          "properties": {},
          "required": [],
          "type": "object"
        },
        "naturalLanguageDescription": "Current Base block number, timestamp, age and gas usage — the cheapest real chain read on this node. The 'hello world' of live chain data.. Tier: discovery. Live via x402 or credits; free delayed preview via ?preview=1. Auditable on-chain settlement; Ed25519-signed metrics.",
        "pricingRationale": {
          "notes": "Aligned to x402 ecosystem median (~$0.028/call). Premium tiers reflect multi-source aggregation cost.",
          "price_usdc": 0.001,
          "tier": "discovery",
          "vs_median_x402": 0.04
        },
        "provider": {
          "name": "Losbeto Market Intelligence",
          "url": "https://api.losbeto.xyz"
        },
        "ranking_hints": {
          "category": "discovery",
          "primary_tag": "ChainData",
          "unique_selling_point": "Current Base block number, timestamp, age and gas usage — the cheapest real chain read on "
        },
        "sampleQueries": [
          "GET /chain-block?preview=1  # free delayed sample",
          "GET /chain-block  # live data (returns 402 with payment challenge)"
        ],
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "properties": {
                "queryParams": {
                  "properties": {},
                  "required": [],
                  "type": "object"
                }
              },
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "description": "Current Base block number, timestamp, age and gas usage — the cheapest real chain read on this node. The 'hello world' of live chain data.",
                  "type": "object"
                }
              },
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        },
        "tags": [
          "chaindata",
          "utility",
          "zeroupstream",
          "crypto",
          "market-data"
        ],
        "title": "Chain Block — Losbeto",
        "useCases": [
          "market data input",
          "AI agent research",
          "systematic trading"
        ]
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1790529703/bazaar-icons/b104f2f7df1a4ce6.png",
    "lastUpdated": "2026-10-26T15:21:59.294Z",
    "quality": {
      "l30DaysTotalCalls": 52,
      "l30DaysUniquePayers": 9,
      "lastCalledAt": "2026-10-25T18:36:08.654Z"
    },
    "resource": "https://api.losbeto.xyz/chain-block",
    "serviceName": "Losbeto Market Intelligence",
    "tags": [
      "chaindata",
      "utility",
      "zeroupstream",
      "crypto",
      "market-data"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Current Base block number, timestamp, age and gas usage — the cheapest real chain read on this node. The 'hello world' of live chain data."
}

What the leaf hashes

{"body":"4050b58389aee8bf0f7d51d6e5801df2e949bef27cf1593c956c746017d82325","id":236172,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793028710327241,"prev":15743,"subject":"x402_bazaar:https://api.losbeto.xyz/chain-block","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. 0x5a9fec608cbeedc68ee197f71a4d67792cea844931224a087076a9d7ab0c2924
2. 0xe935e91475b59a13ed95e50ef8df1d74f28bdd82fc79791bf8c78f57c8b0e3ba
3. 0x841940612fea38002a2fc113f92966dbe0a7619bc3eaafb3dd5b58e7f50c9545
4. 0xa0166bbd24674ccdf332236c68b1f21740e11ae891b6bea786a81ca76dd0dd78
5. 0x2e9b5fe8ed703d021d62071bf0bf0da30f9247f6f975de4e460368fd28585847
6. 0x023682717a3c3627f09ffb9f5342fc84ae57363b7a03559c9ef20f9abccf31bc
7. 0x70c6371f88c95f8c107f06b669f88ab572019e6105107b2667c2e5b64a59944b
8. 0x551fd418953c98c9771898eed1d3d941b70e242506f147f035b115c54a52ec06
9. 0xb15202d1c1778091104ee26b81c0e098e095455eb9e6476bd094067a45d11d26
10. 0x1622116357fa2542142143deeb8538ad6f5b0f254675b718611465e74e2937f1
11. 0x31cff173ca81a1fa9b4d9989ccba135fa83af9284e85748cedd858f7cc6cb7c0
12. 0xc4c7772b121e7eab8b40f10646f850453150d76d672e4926bf2534db20273157
13. 0xc8abb13c711b67d9f1ef145286ed450a0f5566f054a4b290ea3d711873bcbe20
14. 0x5cdeb4648502e0633d01cc4f3379d48cccb9d4f528565b2868eb93db0df9e829
15. 0x7726154b91b2ad65b13849ef6cb6443b1f0ff113a3089c9bd5f2bcfc16be099d
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae