How to create a parent and Child Table in 2 different schema ?

Schema 1 : User1 (Will store the parent table TAB1)
Schema 2 : User2 (Will store the parent table TAB2)
Oracle Version : 12.1.0.2

1. Create the parent table TAB1 in USER1 schema with a primary key

USER1 SQL> create table tab1 (n1 number primary key);

Table created.

USER1 SQL> desc tab1
 Name                                                              Null?    Type
 ----------------------------------------------------------------- -------- --------------------------------------------
 N1                                                                NOT NULL NUMBER


2. Grant 'REFERENCE on TAB1' privilege to USER2 schema.

USER1 SQL> grant references on tab1 to user2;

Grant succeeded.

USER1 SQL> exit

3. Create the Child Table TAB2 in USER2 Schema and create the foreign key which references User1.TAB1 table.

USER2 SQL> create table tab2 (

n2 number primary key,

n1 number,

constraint fk_tab2 foreign key(n1) references user1.tab1(n1)

 ); 

Table created.

USER2 SQL>

4. Check the parent child relationship from dba_constraints table:

SYS SQL> SET LINES 300

col parent_owner format A8

col child_owner format A8

col parent_table format A10

col child_table format A10

col parent_cons_name format A15

col child_cons_name format A10

SELECT

   SYS SQL>    p.owner parent_owner,

      c.owner child_owner,

      p.table_name Parent_table,

      p.constraint_name parent_cons_name,

SYS SQL>       c.table_name Child_table,

      c.constraint_name child_cons_name

  FROM

      dba_constraints p, dba_constraints c

where p.owner='&parent_Owner'

  and p.table_name='&Parent_Table_Name'

SYS SQL>   and p.constraint_type IN ('P','U')

  and c.constraint_type='R'

  and p.owner=c.r_owner

  aSYS SQL> nd p.constraint_name=c.r_constraint_name

order by 4;

Enter value for parent_owner: USER1

old  10: where p.owner='&parent_Owner'

new  10: where p.owner='USER1'

Enter value for parent_table_name: TAB1

old  11:   and p.table_name='&Parent_Table_Name'

new  11:   and p.table_name='TAB1'

PARENT_O CHILD_OW PARENT_TAB PARENT_CONS_NAM CHILD_TABL CHILD_CONS

-------- -------- ---------- --------------- ---------- ----------

USER1    USER2    TAB1       SYS_C00120730   TAB2       FK_TAB2

SYS SQL>