Hundreds of RTHK programmes dating back to 2012 are also available. Another programmer, Mr Kin Ko, 47, has been building a decentralised registry called LikeCoin. The blockchain platform helps Internet users identify the metadata-creator, date, time, location, version-of the content through a unique number called an International Standard Content Number, akin to a book's distinctive International Standard Book Number. Any changes made to the content would be known and tracked through changes to