DNS/CnameZone/unboundについて、ここに記述してください。

unboundもいい加減ですね。

$ dig -t ns oss.jp @127.0.0.2

; <<>> DiG 9.9.5-3ubuntu0.5-Ubuntu <<>> -t ns oss.jp @127.0.0.2
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41392
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;oss.jp.                                IN      NS

;; ANSWER SECTION:
oss.jp.                 259181  IN      NS      ns1.oss.jp.
oss.jp.                 259181  IN      NS      ns2.oss.jp.
oss.jp.                 86381   IN      CNAME   oss.jp.s3-website-ap-northeast-1.amazonaws.com.

;; Query time: 0 msec
;; SERVER: 127.0.0.2#53(127.0.0.2)
;; WHEN: Sat Dec 05 17:30:26 JST 2015
;; MSG SIZE  rcvd: 131