What kind of documents or papers can provide a copyright owner to prove his/her right on a code or a text?

Good example https://github.com/github/dmca/blob/master/2021/11/2021-11-12-hackerrank.md

How HackerRank could prove that the interview question text and/or solutions for the interview questions belong to them?

  • 1
    What you posted looks like the answers to HackerRank's questionnaire. In particular, notice that they did not answer some of the questions. For example "I have a good faith belief that use of the copyrighted materials ... is not authorized by the copyright owner, or its agent, or the law." was not answered.
    – Brandin
    Nov 18 at 7:25
  • 6
    I’m voting to close this question because it's not about open source software. Nov 18 at 7:26
  • 2
    This question may be more appropriate for law.stackexchange.com
    – Mureinik
    Nov 18 at 10:20
  • 2
    The short answer is that service providers aren't required to validate DMCA requests (neither takedowns nor restoration requests), and if an error or bad-faith action is made, it's resolved by lawsuit between the two parties. Further questions are indeed appropriate for law.stackexchange.com. Good luck!
    – apsillers
    Nov 18 at 23:53
  • @Brandin "I have a good faith belief that use of the copyrighted materials ..." isn't a question to be answered but an affirmative statement to which the submitter attaches their signature. (See item #7 of docs.github.com/en/github/site-policy/…)
    – apsillers
    Nov 22 at 0:19

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