Erro ao acessar o conteúdo retornado pelo JSON

Estou tentando acessar um serviço retornado pelo meu Web API, mas quando acesso pela função $.getJSON('url') recebo a mensagem: "Failed to load resource: the server responded with a status of 404 (Not Found)".

Web API:

public Response Get(string term)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://itunes.apple.com/search?media=music&term=" + term);
            try
            {
                using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
                {
                    if (response.StatusCode != HttpStatusCode.OK)
                        throw new Exception(String.Format(
                        "Server error (HTTP {0}: {1}).",
                        response.StatusCode,
                        response.StatusDescription));
                    DataContractJsonSerializer jsonSerializer = new DataContractJsonSerializer(typeof(Response));
                    object objResponse = jsonSerializer.ReadObject(response.GetResponseStream());
                    Response jsonResponse = objResponse as Response;
                    return jsonResponse;
                }
            }
            catch (WebException ex)
            {
                WebResponse errorResponse = ex.Response;
                using (Stream responseStream = errorResponse.GetResponseStream())
                {
                    StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
                    String errorText = reader.ReadToEnd();
                    // log errorText
                }
                throw;
            }
        }

Model Album:

 [DataContract]
    public class Album
    {
        [DataMember(Name = "artistName")]
        public string artistName { get; set; }
        [DataMember(Name = "trackName")]
        public string trackName { set; get; }
        [DataMember(Name = "artworkUrl60")]
        public Uri artworkUrl60 { set; get; }
        [DataMember(Name = "collectionName")]
        public string collectionName { set; get; }
        [DataMember(Name = "trackTimeMillis")]
        public string trackTimeMillis { set; get; }

        public DateTime ReleaseDate{set;get;}
        [DataMember(Name = "releaseDate")]
        public string releaseDate { set; get; }

        [OnSerializing]
        void OnSerializing(StreamingContext context)
        {
            this.releaseDate = this.ReleaseDate.ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);

            this.trackTimeMillis = ItunesController.FormatTrackTimeMillis(this.trackTimeMillis);
        }

        [OnDeserialized]
        void OnDeserializing(StreamingContext context)
        {
            if (this.releaseDate == null)
            {
                this.ReleaseDate = default(DateTime);
            }
            else
            {
                this.ReleaseDate = DateTime.Parse(this.releaseDate);
            }
        }
    }

Model Response:

[DataContract]
    public class Response
    {
        [DataMember(Name = "results")]
        public Album[] albuns { set; get; }
    }

javascript na página HTML:

<script type="text/javascript">
        function find() {
            var search = $('#termId').val();
            $.getJSON("api/itunes/" + search,
                function (data) {
                    alert(data);
                    $.each(data, function (key, val) {
                        alert(val.artistName);
                        var image = document.getElementById('artId');
                        image.src = val.artworkUrl60;

                        $('#artistName').val(val.artistName);

                    });
                })
            .fail(
                function (jqXHR, textStatus, err) {
                    $('#result').text('Erro : ' + err);
                });
        };
    </script>

O que posso estar fazendo de errado?