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Thanks for your kind words, your valuable comments and very interesting suggestions! Will consider...

• DenisM 12y ago
  One more thing. Consider publishing all you hashes for each day in a digest to e.g. USENET or other permanent public storage, then hashing all of those daily hashes together and publishing the meta-hash in New York Times. That way even if blockchain fails as a dating method due to forgery, one could use USENET + paper copies of NYT to date any of the documents. As a matter of fact, there is no limit to how many different ways of dating a hash you could add to your service. Just make sure you're also including a previous day's unpredictable event (stock market activity?), so that both early and late boundaries can be established with confidence.
  • abacus76 12y ago
    This would mean that one would eventually have to rely on the NYT which is a "centralized" source of information. According to the bitcoin experts the blockchain cannot be forged, especially if one's transaction is older than a few hours. If the bitcoin community are right about the above and if you think of the blockchain as a non-centrally-relied bulletin that anyone can write anything (as long as they pay the appropriate fees to the bitcoin miners) and that nobody can erase what was written in the past then there should be no need for relying on any other source of information such as the NYT. On the other hand your idea could be useful as a backup, in case something goes wrong in the blockchain technology!
    • DenisM 12y ago
      Backup is exactly what I suggested. Don't rely on a single technology, especially if it's crypto.