I hereby claim:
- I am adonaldson on github.
- I am ad (https://keybase.io/ad) on keybase.
- I have a public key whose fingerprint is 7AF3 8C66 99E1 A514 58DB 2936 BB24 B5C4 563D F050
To claim this, I am signing this object:
{
    "body": {
        "key": {
            "fingerprint": "7af38c6699e1a51458db2936bb24b5c4563df050",
            "host": "keybase.io",
            "key_id": "BB24B5C4563DF050",
            "uid": "65fa404d9342581891250a45a0bab900",
            "username": "ad"
        },
        "service": {
            "name": "github",
            "username": "adonaldson"
        },
        "type": "web_service_binding",
        "version": 1
    },
    "ctime": 1395149787,
    "expire_in": 157680000,
    "prev": "d676a19bf01835257409433dd27b61ea14cfee6954e96f301bc0f81da80babf9",
    "seqno": 3,
    "tag": "signature"
}with the PGP key whose fingerprint is
7AF3 8C66 99E1 A514 58DB  2936 BB24 B5C4 563D F050
(captured above as body.key.fingerprint), yielding the PGP signature:
-----BEGIN PGP MESSAGE-----
Version: GnuPG v1.4.12 (Darwin)
owFdkT9oFEEUxvfiH2JEMJWF3WhhccrMzp+dWQjIKSLaKEaxMcfMzsxmMM6eu3un
IRw2glpFS+1MxDSBNCqIjaJgYW1lY2VrUAtLZ87YOM3wvvf7Hu/jPTywK5mefXP0
5Ycrc9sXOp/eflPJpWPnv6wAVellkK+A62byWedLUw9q51uQg0xazAvGhDBIUkQo
1yoVmCmVEkULQhnWFlIIumCxaqIjjFGyMSdcFbRQ9J0Oaq+Xkh49FfnTZ/7yw0mD
USsJJFpgklKOuEAphZJQCZVUAk7AxtRe3jCBlhqMuyDUI1eYuO2OXrp2caj+Zysv
l3RT+ehplwdRvGVUf8feV87rEDa4RqZuXOByFMiiddGPsAh5RcazLjC3B642fRcJ
mjEOw+uCQW1GYaRmGZNIKAsRxzSlGYGCYKx1mimGjESksMYwQYkRzGKIVAEtR1ry
GNEKEAPd9BXIcVhTlmFk40ov22FtwPj+wu5kdjrZu2cqXiuZ2Xfw3w2H5zrJ+p2P
jzZeHbn8ZHv+6xQS6/vx+x9PN49vrPq1Z6vXzt7rJM8pLL9vHf596PGDkxdn8OcX
43ShfLc2/5r/vDp391f+Bw==
=QWXT
-----END PGP MESSAGE-----
And finally, I am proving ownership of the github account by posting this as a gist.
Consider the keybase command line program.
# look me up
keybase id ad
# encrypt a message to me
keybase encrypt ad -m 'a secret message...'
# ...and more...