curl --request GET \
  --url https://api.mnemom.ai/v1/on-chain/history

{
  "anchors": [
    {
      "anchor_id": "<string>",
      "merkle_root": "<string>",
      "tx_hash": "<string>",
      "block_number": 123,
      "gas_used": 123,
      "agent_ids": [
        "<string>"
      ],
      "anchored_at": "2023-11-07T05:31:56Z"
    }
  ],
  "total": 123
}