Evidence row 547740

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ask.singitai.app/v1/audio/speech"
    ]
  ],
  "name": "SingIt Text to Speech",
  "owner_address": "0xc23d1dc0f5fce1abffb051e06cb93f0329968b4e",
  "raw": {
    "accepts": [
      {
        "amount": "1082",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xC23d1Dc0f5fCe1abfFB051e06cB93f0329968B4e",
        "scheme": "exact"
      },
      {
        "amount": "2082",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "4an2sqamWWhny9mjLsMtGXCDXakeNtg6vSLq4QvhdmQu",
        "scheme": "exact"
      }
    ],
    "description": "Text to speech (TTS) API: text read aloud by 11 voice models (Kokoro, ElevenLabs, Gemini, xAI, MiniMax and more; list at GET /v1/audio/models), no API key needed. Call it when an agent needs spoken audio made from text. OpenAI speech request format, mp3 by default. Served by SingIt.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "input": "Hello from SingIt.",
              "model": "venice-kokoro-tts",
              "response_format": "mp3",
              "voice": "af_heart"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "input": {
                      "description": "The text to read aloud.",
                      "maxLength": 4096,
                      "minLength": 1,
                      "type": "string"
                    },
                    "model": {
                      "description": "A speech model id from GET /v1/audio/models.",
                      "examples": [
                        "venice-kokoro-tts"
                      ],
                      "type": "string"
                    },
                    "response_format": {
                      "default": "mp3",
                      "description": "The audio format.",
                      "enum": [
                        "mp3",
                        "opus",
                        "aac",
                        "flac",
                        "wav",
                        "pcm"
                      ],
                      "type": "string"
                    },
                    "speed": {
                      "description": "Speaking speed.",
                      "maximum": 4,
                      "minimum": 0.25,
                      "type": "number"
                    },
                    "voice": {
                      "description": "A voice of the model; they are listed at GET /v1/audio/models.",
                      "examples": [
                        "af_heart"
                      ],
                      "maxLength": 60,
                      "type": "string"
                    }
                  },
                  "required": [
                    "model",
                    "input"
                  ]
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "builder-code": {
        "info": {
          "a": "bc_is3fuv36"
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": false,
          "properties": {
            "a": {
              "description": "App builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            },
            "s": {
              "description": "Service builder codes",
              "items": {
                "pattern": "^[a-z0-9_]{1,32}$",
                "type": "string"
              },
              "maxItems": 11,
              "type": "array"
            },
            "w": {
              "description": "Wallet builder code",
              "pattern": "^[a-z0-9_]{1,32}$",
              "type": "string"
            }
          },
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792921332/bazaar-icons/a240c598b3f928d1.png",
    "lastUpdated": "2026-10-27T16:48:46.581Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-27T16:48:46.107Z"
    },
    "resource": "https://ask.singitai.app/v1/audio/speech",
    "serviceName": "SingIt Text to Speech",
    "tags": [
      "text-to-speech",
      "tts",
      "speech",
      "audio",
      "openai-compatible"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Text to speech (TTS) API: text read aloud by 11 voice models (Kokoro, ElevenLabs, Gemini, xAI, MiniMax and more; list at GET /v1/audio/models), no API key needed. Call it when an agent needs spoken audio made from text. OpenAI speech request format, mp3 by default. Served by SingIt."
}

What the leaf hashes

{"body":"d8c55d480f2be677dd8b70f2c123c20ec86ef80d25184858a3e586904f62c6de","id":547740,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133215303812,"prev":527689,"subject":"x402_bazaar:https://ask.singitai.app/v1/audio/speech","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xe2669bcd71be7f5ad8e0441ed983c0ad976b8822906898a47d3c674a0b9c664e
2. 0x00561583c5cde4d02f844d46cabcdaae59d750ef80a0eb15eb068ca29a6abd74
3. 0x0eeb5a62350cb35c5ca586bebb13365b9f5741426f40c85c3a7e1f1faddde204
4. 0x52a4f14639fea80c36d1022876926a7a2915ca230112278f04fe91b7d48db9ed
5. 0x57767fd5a9b610d4e2686e9502b40f8714b0e41e831515f2f37bbe8f74058e2f
6. 0xfe14f1fc0ce081f449fe1b04f3f156e949cf5e94a54cbb79b5c7f2cccc066b74
7. 0x4500c740ed6b1c3f515bf1b9ecaffa39e70301d653063bda24c87cb4753eb83e
8. 0x108d81a73799a73af5d1aa98e8a2a780bff990e786aa475c9d046c8033b83f33
9. 0x392405f5f4eb460d6d03c32ae0f6a5c43ab05bc95057e4f7eeeaa23af49e2679
10. 0x90567d89b500af7cbc624ef49608f0d1f701dc55775e50da7e47e5ba92d899d3
11. 0x34f3c48e71e3a51d90a85a367f52d52a7bd33af28aa5a0369e154bffa6a38243
12. 0x46ff3840378aba3ab5311ff9a58e7269ceff45cbef540c18a2bad9af3d6127bb
13. 0xd98ea318b514153f74841c90aff18a807e61314ec99610bf3bdbb7219da01cbd
14. 0xf72dee7a0c7534cb19ede4959b957b00c0a8285c36ad49dd2ce1c1092bf60d93
15. 0x24e3e2bb8ee1e8d20756de35f0e0c4ec8eb1f193bd2cf3f077ee1f92f211c34d
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4