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https://keybase.io/mpassosbr
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I hereby claim:

  * I am an admin of https://profmatheus.com
  * I am mpassosbr (https://keybase.io/mpassosbr) on keybase.
  * I have a public key ASCC3NGP3efbcTj04IJk1_789AYkPuLhB8jzsUItht1Lfgo

To do so, I am signing this object:

{
  "body": {
    "key": {
      "eldest_kid": "012082dcd18fdde7db7138f4e08264d7fefcf406243ee2e107c8f3b1422d86dd4b7e0a",
      "host": "keybase.io",
      "kid": "012082dcd18fdde7db7138f4e08264d7fefcf406243ee2e107c8f3b1422d86dd4b7e0a",
      "uid": "9abe2bcf6fe4da1327a1c5b1ecdb5f19",
      "username": "mpassosbr"
    },
    "merkle_root": {
      "ctime": 1575914792,
      "hash": "37f5b2bfcf0acff91ce32719b53638a1460bbf33571af61fbd2a2c84ebf5a187b604ef367990412297a07ef3b8a2fe5df95d991b25a0644bd5c68bdc1289c81e",
      "hash_meta": "e9b22ba55bfa3e7f334834eb1d0daf21c137fcbeacbc5622c5dff9079590f552",
      "seqno": 13095342
    },
    "service": {
      "entropy": "Gc0+dowA94Er0/BB2RbTYwKC",
      "hostname": "profmatheus.com",
      "protocol": "https:"
    },
    "type": "web_service_binding",
    "version": 2
  },
  "client": {
    "name": "keybase.io go client",
    "version": "5.0.0"
  },
  "ctime": 1575914802,
  "expire_in": 504576000,
  "prev": "5bcde5c639696e6e40779a83b719cd0b457d9c3e4160b4e753b628afe48be642",
  "seqno": 15,
  "tag": "signature"
}

which yields the signature:

hKRib2R5hqhkZXRhY2hlZMOpaGFzaF90eXBlCqNrZXnEIwEggtzRj93n23E49OCCZNf+/PQGJD7i4QfI87FCLYbdS34Kp3BheWxvYWTESpcCD8QgW83lxjlpbm5Ad5qDtxnNC0V9nD5BYLTnU7Yor+SL5kLEIEwHmT27SrwNcpAhZLxDJY6BKrlFsa4yvvuSbdzSAxNrAgHCo3NpZ8RAOaz8/UYKeiVZ7x2Jpmvzt/UwI1uA8+dgw0i7VknzlzeE1uYlM+AReHfsmtbVxIX0mEiWzUaCxFaP3jX/MKoWAKhzaWdfdHlwZSCkaGFzaIKkdHlwZQildmFsdWXEIIXxNL1C/hkZdXd1viDq3UTtj0EwWDxv6pHxC3TduAjco3RhZ80CAqd2ZXJzaW9uAQ==

And finally, I am proving ownership of this host by posting or
appending to this document.

View my publicly-auditable identity here: https://keybase.io/mpassosbr

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