According to CryptoSlam data on September 15, the top five blockchains in terms of NFT sales in the past seven days are:

1. NFT sales on Ethereum chain were $27,482,211, down 6.95%;

2. Sales on Bitcoin chain were $14,808,867, up 28.83%;

3. Sales on Solana chain were $13,088,078, down 2.25%;

4. Sales on BNB Chain were $7,020,978, down 9.13%;

5. Sales on Polygon chain were $5,151,498, down 43.54%.