How do you manage delayed metadata and image releases like modern nft projects are doing?

I have a smart contract working on rinkeby which is minting ERC721 tokens. The goal is to allow minting for a week and then to release the metadata and images after a week has passed.

When I deploy it, I use as the baseUri that I feed into the contract.

Next, im simulating a delayed metadata/image release:

The image_url metadata property is failing in validation because ipfs links use a hash and im using the integer token value. I cant see to figure out how to bridge this gap since the hash is generated outside of the contract and it looks like the contract is what is generating this link in the metadata.

Could anyone shine a light on my dilemna? Thank you! :smiley: