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MinHash Fingerprints
Compress NFT metadata into compactable signatures stored onchain. Like a fuzzy fingerprint—you can't reconstruct the data, but you can compare similarity.
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Jaccard Similarity Onchain
J(A,B) = |A ∩ B| / |A ∪ B| — estimate set overlap between 0 and 1. Two pocket monsters sharing year + type = higher similarity than monster vs art.
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Semi-Fungible Bids
Place orders for "NFTs similar to this one" with a tolerance threshold. Auctioneers can pull matching bids into their rooms automatically.