No — the Identity Sharing System (KPS) and the Identity Notification System are two different things. As a hotelier, you must join the General Directorate of Security's Identity Notification System, or else report guest identities to law enforcement manually.
The Identity Sharing System, by contrast, belongs to the General Directorate of Civil Registration and Citizenship. Its website states that it can be used by:
- Legal entities providing public services,
- Insurance and pension companies operating under the Insurance Law No. 5684,
- Banks operating under the Banking Law No. 5411,
- Financial leasing and financing companies under Law No. 6361.
Among the organisations currently using the service, no private-law entities other than banks/financial institutions, insurance companies and hospitals have been observed. (Current KPS institution list (in Turkish))