I know how to download image from instagram with specific hashtags. I do below to download images from instagram
string[] splittedHashTags = hashtags.Split(',');
        foreach (string tag in splittedHashTags)
        {
            do
            {
                WebRequest webRequest = null;
                if (webRequest == null && string.IsNullOrEmpty(nextPageUrl))
                    webRequest = HttpWebRequest.Create(String.Format("https://api.instagram.com/v1/tags/{0}/media/recent?access_token={1}", tag, strAccessToken));
                else
                    webRequest = HttpWebRequest.Create(nextPageUrl);
                var responseStream = webRequest.GetResponse().GetResponseStream();
                Encoding encode = System.Text.Encoding.Default;
                using (StreamReader reader = new StreamReader(responseStream, encode))
                {
                    JToken token = JObject.Parse(reader.ReadToEnd());
                    var pagination = token.SelectToken("pagination");
                    if (pagination != null && pagination.SelectToken("next_url") != null)
                    {
                        nextPageUrl = pagination.SelectToken("next_url").ToString();
                    }
                    else
                    {
                        nextPageUrl = null;
                    }
                    var images = token.SelectToken("data").ToArray();
                    foreach (var image in images)
                    {
                        imageUrl = image.SelectToken("images").SelectToken("standard_resolution").SelectToken("url").ToString();
                        if (String.IsNullOrEmpty(imageUrl))
                            Console.WriteLine("broken image URL");
                        co
                        var imageId = image.SelectToken("id");
                        double imageCreatedTime = image.SelectToken("created_time").Value<double>();
                        DateTime dtImgCreatedTime = UnixTimeStampToDateTime(imageCreatedTime);
                        var webClient = new WebClient();
                        byte[] imageBytes = webClient.DownloadData(imageUrl);
                          SPSite site = new SPSite(microSiteUrl);
                                                                                   }
                    }
                }
            }
            while (!String.IsNullOrEmpty(nextPageUrl));
        }
But i would like to know how can i search images in instagram if they exist or not by providing imageid?
                        
use this API for get image data by image_id:
https://instagram.com/developer/endpoints/media/#get_media