One of the questions I get the most is:
Is there enough proof available that art was minted on that date?
Yes, there is! Back when the cards were minted, the image used was first uploaded to IPFS and the hash was set when minting the card.
For example, KFPEPE has IPFS hash “QmNPecJjQpggFW3o6ZFoypMrMmLDhxH7oJfjRi1WJA47kq”
Here’s how you can get the hash from the contract:
1. First, go to https://www.myetherwallet.com/wallet/interact and connect your wallet (I used the option “browser extension” since I use metamask).
2. In the field “Contract address” fill in the address of the card you want to check. In our case “0x648445e48093d999966375b30186D433fEF9c364” for KFPEPE. For all contract addresses see https://docs.google.com/spreadsheets/d/1vd_95vKxMG4UWv6VLEXbEnZkY2GauZhd9mzBbzFkSCU/edit
3. In the field “ABI/JSON interface” paste the ABI of the contract and click “Interact”
[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"standard","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"description","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"target","type":"address"},{"name":"mintedAmount","type":"uint256"}],"name":"mintToken","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"ipfs_hash","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"desc","type":"string"}],"name":"setDescription","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"isLocked","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"},{"name":"_extraData","type":"bytes"}],"name":"approveAndCall","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"lock","outputs":[],"payable":false,"type":"function"},{"inputs":[{"name":"initialSupply","type":"uint256"},{"name":"tokenName","type":"string"},{"name":"tokenSymbol","type":"string"},{"name":"tokenDescription","type":"string"},{"name":"ipfsHash","type":"string"}],"payable":false,"type":"constructor"},{"payable":false,"type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]
4. Next, from the dropdown, select “ipfs_hash” and click “Call”. You’ll see the hash that matches the one above. Good job 👌
5. You can use this hash combined with the IPFS url like this http://ipfs.io/ipfs/QmNPecJjQpggFW3o6ZFoypMrMmLDhxH7oJfjRi1WJA47kq and you’ll be able to see the image.
