Authenticating secp256k1 and other keys

Has anyone looked into Tyk Authenticating users sowlly based on them controling a BitCoin or Ethereium private key?

I have seen some work on converting the typical hex keys into JWK and then generating JWT’s but on the verification side most JWT libraries do not suppor the curve secp256k1 .

Related work links:

GitHub - decentralized-identity/did-jwt: Create and verify DID verifiable JWT's in Javascript works for DID-key which is secp256k1
from a priv key in hex to pem encoding and decoding back to hex for both public and private key using EC secp256k1 · GitHub secp256k1 hex to JWK

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