example.com
https://example.com
cid:bafybeigdyrzt5sfp7udm7hu76uh7y26nf3efuylqabf3oclgtqy55fbzdi
.
12345

# whitespace
 bafybeigdyrzt5sfp7udm7hu76uh7y26nf3efuylqabf3oclgtqy55fbzdi
bafybeigdyrzt5sfp7udm7hu76uh7y26nf3efuylqabf3oclgtqy55fbzdi 
bafybe igdyrzt5sfp7udm7hu76uh7y26nf3efuylqabf3oclgtqy55fbzdi

# old CIDv0 not supported
QmbWqxBEKC3P8tqsKc98xmWNzrzDtRLMiMPL8wBuTGsMnR

# https://github.com/ipfs-shipyard/is-ipfs/blob/master/test/test-cid.spec.ts
noop