http://csp2.rcsc.lt/aia/RCSC_RootCA.crt
http://csp2.rcsc.lt/aia/RCSC_IssuingCA.crt

The published 'aia/RCSC_RootCA.crt' file contains two DER certificates concatenated:

1) the actual root,
   Serial Number (hex): 4f001ba124bdcb8848bebd3f2b62c7c5
   Subject: CN=RCSC RootCA,O=VI Registru centras- i.k. 124110246,OU=RCSC,C=LT
   Subject Key Identifier: 1a26014f23f10fa00fdc55213bde93bbccfe2e1e

2) an older root,
   Serial Number (hex): 50170ee7ef12e9b74a943552e16580c9
   Subject: CN=Registru Centro Sertifikatu Centras (Root CA),O=VI Registru Centras - i.k. 124110246,OU=RCSC,C=LT
   Subject Key Identifier: 3164955981591e0405975795287cb74b142f7d60
