title_body: Verify that Token is NFT I was wondering how it is possible to actually validate if a certain Token is an NFT without having to inspect the code of the script which mints that Token? Only by checking if the current quantity is 1 will certainly not ensure that it won't be possible to mint more of that Token.
upvoted_answer: You can check the token policy for that. For most NFT projects you can look it up on https://pool.pm
  A token policy can look like this:
  {
    &quot;scripts&quot;: [
      {
        &quot;keyHash&quot;: &quot;66833acfcf26d87e56bc829aa7bcef13295d4eee4d8b442175bd67a9&quot;,
        &quot;type&quot;: &quot;sig&quot;
      },
      {
        &quot;slot&quot;: 31882046,
        &quot;type&quot;: &quot;before&quot;
      }
    ],
    &quot;type&quot;: &quot;all&quot;
  }
  
  You can see the &quot;slot&quot;: 31882046 and &quot;type&quot;: &quot;before&quot; values which means tokens with this policy can only be minted before slot 31882046. To be sure that your NFT is unique, you can check that the quantity is 1 and the current slot of the blockchain is later than the one mentioned in the policy.
  This policy is from the following NFT: https://pool.pm/1131301ad4b3cb7deaddbc8f03f77189082a5738c0167e1772233097.CardanoBits1947