You can request a copy of the personal information UDI has registered in SIS, and how this information is processed.
Accessing, correcting or deleting Schengen Information System (SIS) data (pdf, 193 kB)
Requesting access is free of charge.
You will normally receive a reply within a month. If it takes longer, UDI must notify you and provide justification.
Section 15 of the SIS Act (in Norwegian) (external website)
Article 15 of the General Data Protection Regulation (external website)