And since the block header influences the make - up of subsequent block headers, neither would any of those. (bitcoinmagazine.com)
This can be a challenge for existing blockchain technologies because blockchains by their nature do not allow for past data to be deleted, but rather only updated in subsequent blocks, which may not be sufficient to comply with the law. (coindesk.com)
Geth v1.8.0 also introduces a new API endpoint that caters to tracing multiple subsequent blocks with minimal overhead, that can locate chain segments. (cryptotimes.news)