Querying SQLite by BLOB column not possible?

I'm trying to query a SQLite table by a blob column which is a SHA256 hash.

CREATE TABLE Articles (HASH BLOB(32) PRIMARY KEY, Article TEXT)

A query like this doesn't return anything:

SELECT * FROM Articles WHERE HASH = ?
-- the parameter is bound using sqlite3_bind_blob, not to use literals

I made this little Program in C# which creates the table and also inserts a row to try.

using System;
using System.Linq;
using System.Data;
using System.Data.SQLite;
using System.IO;
using System.Security.Cryptography;

// using lib;

public class Program {

    static int Main(string[] args) 
    {
        // Console.WriteLine(sqlite3.LibVersion);

        byte[] qHash;
        string qArticle = "Lorem ipsum dolor sit amet";

        using (var hashAlgorithm = new SHA256CryptoServiceProvider ()) {

            byte[] bytes = System.Text.Encoding.UTF8.GetBytes(qArticle);

            qHash = hashAlgorithm.ComputeHash(bytes);
        }

        var con = new SQLiteConnection ("Data Source=test.sqlite");
        con.Open();

        try {
            var create = new SQLiteCommand ("CREATE TABLE Articles (HASH BLOB(32) PRIMARY KEY, Article TEXT)", con);
            create.ExecuteNonQuery();

            var insert = new SQLiteCommand ("INSERT INTO Articles (HASH, Article) VALUES (?, ?); SELECT last_insert_rowid();", con);

            var insertParam0 = new SQLiteParameter(DbType.Binary);
            insertParam0.Value = qHash;
            insert.Parameters.Add(insertParam0);

            var insertParam1 = new SQLiteParameter(DbType.String);
            insertParam1.Value = qArticle;
            insert.Parameters.Add(insertParam1);

            object insert_result = insert.ExecuteScalar();
            var insert_rowid = (long)insert_result; 

        } catch { } // silently fail if exists usually

        var query = new SQLiteCommand ("SELECT * FROM Articles WHERE HASH = @hash", con);

        var param = new SQLiteParameter ("@hash", DbType.Binary);
        param.Value = qHash;
        query.Parameters.Add(param);

        using (SQLiteDataReader reader = query.ExecuteReader()) {

            while (reader.NextResult()) {
                var hash = new byte[32];
                long hashLen = reader.GetBytes(0, 0, hash, 0, 32);

                string article = reader.GetString(1);

                Console.WriteLine("HASH: {0}; Article: {1}", 
                    hash == null ? null : BitConverter.ToString(hash).Replace("-", ""), 
                    article
                );
            }

        }
        con.Close();

        return 0;
    }

}

However the reader doesn't have a result. Is querying a BLOB column not supported at all?
Is something else bugging me?