I made a trace of REPORT SCHEMA command and found the following sql statements for permanent and temporary tablespaces:

for REPORT SCHEMA for permanent tablespaces

SELECT RC_DATAFILE.FILE#, RC_DATAFILE.CREATION_CHANGE#, CREATION_TIME, NAME,
TABLESPACE_NAME, TS#, NULL, BLOCKS, BLOCK_SIZE, BYTES / 1024, NULL,
STOP_CHANGE#, READ_ONLY, RFILE#, DECODE(INCLUDED_IN_DATABASE_BACKUP, ‘YES’,
1, 0), AUX_NAME, RC_DATAFILE.DBINC_KEY, OFFR.OFFLINE_SCN, OFFR.ONLINE_SCN,
OFFR.ONLINE_TIME, DECODE(ENCRYPT_IN_BACKUP, ‘ON’, 1, ‘OFF’,2, 3) ENCRYPT
FROM
RC_DATAFILE, OFFR WHERE DB_KEY = :B4 AND RC_DATAFILE.DBINC_KEY = :B3 AND
OFFR.FILE#(+) = RC_DATAFILE.FILE# AND OFFR.CREATE_SCN(+) =
RC_DATAFILE.CREATION_CHANGE# AND OFFR.DBINC_KEY(+) = :B3 AND
OFFR.OFFR_STAMP(+) = 0 AND RC_DATAFILE.CREATION_CHANGE# :B1 ) ORDER BY RC_DATAFILE.FILE#

where :B4 = 1 (index of registered database within catalog)
:B3 = 2 (number of reincarnation of a database)
:B2 and :B1 = 900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
for REPORT SCHEMA;
and :B2 and :B1 = 245800 in my case
that is equal to
l1> select LOW_SCN, LOW_TIME, COMPLETION_TIME from al where LOW_SCN = 245800;

LOW_SCN LOW_TIME COMPLETION_TIME
———- —————– —————–
245800 11/20/06 07:01:25 12/03/06 17:13:33

and SYSDATE was for Dec 3

for temporary tablespace the sql is
SELECT TF.FILE# TFNUMBER, TF.CREATE_SCN TFCREATIONSCN, TF.CREATE_TIME
TFCREATIONTIME, TFATT.FNAME FILENAME, TS.TS_NAME TSNAME, TS.TS# TSNUMBER,
DECODE(TFATT.AUTOEXTEND, ‘ON’, 16, 0) STATUS, TS.BIGFILE ISSFT,
TFATT.BLOCKS BLOCKS, TF.BLOCK_SIZE BLOCKSIZE, TFATT.MAX_SIZE MAXSIZE,
TFATT.NEXT_SIZE NEXTSIZE, TF.RFILE# RFNUMBER, DBINC.DBINC_KEY DBINCKEY
FROM
DBINC, TS, TF, TFATT WHERE DBINC.DBINC_KEY = TS.DBINC_KEY AND TS.DBINC_KEY =
TF.DBINC_KEY AND TS.TS# = TF.TS# AND TS.CREATE_SCN = TF.TS_CREATE_SCN AND
TF.DBINC_KEY = TFATT.DBINC_KEY AND TF.FILE# = TFATT.FILE# AND TF.CREATE_SCN
= TFATT.CREATE_SCN AND TFATT.END_CKP_KEY IS NULL AND DBINC.DB_KEY = :B5 AND
DBINC.DBINC_KEY = :B4 AND TF.DROP_SCN IS NULL AND (:B3 IS NULL OR
((TS.CREATE_SCN