# Timestamp your NFT files BEFORE they're sold in order to avoid offchain NFT frontrunning. Most NFT marketplaces are moving towards "Lazy minting", which lets you create NFTs for free. Instead of having to pay upfront cost just to list an NFT to a marketplace, now users can post keep their NFTs offchain until someone purchases it. The NFT is minted ONLY when a purchase is made. This is great, but it also means your NFT is NOT registered on the blockchain until someone purchases it. This means someone can copy your NFT files and list them on another marketplace and claim intellectual property. Avoid this situation by timestamping your IPFS hashes on a blockchain, for FREE.
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