The TLD is signed, maybe move registrars?
Only these TLDs are supported by Namecheap, however you could always try to add DS records yourself. but only if your zone is using Custom NS.
Currently Supported TLDs: .com
.net
.info
.io
.bid
.cloud
.college
.design
.feedback
.security
.top
.trade
.webcam
.xyz
Source CloudFlare
dig +dnssec DS social.
; <<>> DiG 9.10.3-P4 <<>> +dnssec DS social.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48868
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags: do; udp: 1280
;; QUESTION SECTION:
;social. IN DS
;; ANSWER SECTION:
social. 84594 IN DS 32212 8 1 BA0088DADB38E5F205ECA4C71DCCF976C2DACFAB
social. 84594 IN DS 32212 8 2 1FF8492BF0DDFE3C035C6E21CF7F53110B414F23F06DF3D06C87C67A B5D3385F
social. 84594 IN RRSIG DS 8 1 86400 20161220170000 20161207160000 39291 . gozLeU8NuQukhYHBTlvMAXT8pAX+gVl2aR2QEDP9rOcBm9f/L3d7Wrz9 BSYrGZ22TmySMzucdHrud4Q18/6cn5t17yGvK/RmYTRVlF/lzW+ZgwJW R3nNu0W4DdDn6+ufd35aO2GW5OEodPqhRD87bilW1eScTUePtp53tI2f QphIOcOc4f/C3F5kkOo5ZAPlxcfqnur4LmzW8Y6EBKqk+O7c3g2n5BaG hEuFZi+G2ioZTs2QT5go3X0dTExPWhi12PSvSMvM+6CZ6J2Psy265n16 byhiLcddwQef6kcCOjUi3OQn37Zk90wu3+OJnSFtXih+WwyA3OOt3JDL JLHNuQ==
;; Query time: 0 msec
;; SERVER: 192.168.11.1#53(192.168.11.1)
;; WHEN: Wed Dec 07 18:03:24 Eastern Standard Time 2016
;; MSG SIZE rcvd: 406