Here is the compilation of all the current contest on Steem blockchain at one place..for everyone..
It uses a system of decentralized trust-less verification based on some cryptographic functions. It uses a public ledger with a digital signature.
https://webguruz.in/new/Video-Chelsea-Krasnodar.html
https://webguruz.in/new/Video-Chelsea-Krasnodar.html
https://webguruz.in/new/Video-Chelsea-Krasnodar.html
https://webguruz.in/new/Video-Chelsea-Krasnodar.html
https://webguruz.in/new/Video-Chelsea-Krasnodar.html
https://webguruz.in/new/Video-Chelsea-Krasnodar.html
https://webguruz.in/new/Video-Chelsea-Krasnodar.html
Actually, no one can copy one of your signature and forge it. The signatures are verified using the public key. It is 256-bit signature and is completely infeasible to create a signature without knowing the secret key and only signed transactions are valid.
https://ecf.org.hk/img/Video-Chelsea-Krasnodar-01.html.html
https://ecf.org.hk/img/Video-Chelsea-Krasnodar-01.html.html
https://ecf.org.hk/img/Video-Chelsea-Krasnodar-01.html.html
https://ecf.org.hk/img/Video-Chelsea-Krasnodar-01.html.html
https://ecf.org.hk/img/Video-Chelsea-Krasnodar-01.html.html
https://ecf.org.hk/img/Video-Chelsea-Krasnodar-01.html.html
that is maintained by decentralized nodes. Some of these nodes are called miners and responsible for adding new blocks to this blockchain.
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
https://webguruz.in/new/Video-Chelsea-Krasnodar-02.html.html
That was Alll I could find, if you know any other on going contest on Steem blockchain, please let me know in the comments section below and please resteem this post.