https://twitter.com/BlockChainCaffe/status/1067412992336240640
ByteStamp
The Internet Timestamp Service

The file is timestamped at UTC Date/Time:
2018-12-01 15:18:21 UTC
with 72718 confirmations in block number 2700383 - ID transaction: be571b... #ByteStampProof
Prev MD5 HashCash: c28bc74bd32d6f91bb52fe095529d7b5
MD5 HashCash: 8cfdc41a9ead2437ebb85a697b919300

https://twitter.com/BlockChainCaffe/status/1067412992336240640
Note MD5: 394d9f3fe2eff52660cef7906584d2ff