For historical reasons, the BBS Data Integrity spec CR was published before the CID spec went into CR, so we used the VC-DATA-INTEGRITY spec for the key format reference:
https://w3c.github.io/vc-di-bbs/#verification-methods
Once the CID spec goes into REC, we should update the reference in BBS to use the CID reference:
https://www.w3.org/TR/cid/#Multikey
For historical reasons, the BBS Data Integrity spec CR was published before the CID spec went into CR, so we used the VC-DATA-INTEGRITY spec for the key format reference:
https://w3c.github.io/vc-di-bbs/#verification-methods
Once the CID spec goes into REC, we should update the reference in BBS to use the CID reference:
https://www.w3.org/TR/cid/#Multikey