Patent Pledge

nChain hereby pledges not to assert its Pledged Patent(s) against you for making, using, selling, offering for sale, importing or distributing any implementation to the extent it conforms to the Merkle Proof Standardized Format Specification, subject to the following terms. This is a personal pledge directly from nChain to you.

If you implement the Merkle Proof Standardized Format Specification, this pledge only extends to implementations for use on the Bitcoin SV blockchains. The Bitcoin SV blockchains are defined, for the purposes of the pledge, as the Bitcoin blockchain containing block height #556767 with the hash “000000000000000001d956714215d96ffc00e0afda4cd0a96c96f8d802b1662b” and the test blockchains that are supported by the unmodified Software.

If you file, maintain or voluntarily participate in a patent infringement lawsuit against an implementation of the Merkle Proof Standardized Format Specification, then this pledge does not apply with respect to any implementation of the same Merkle Proof Standardized Format Specification made or used by you.

If you implement the Merkle Proof Standardized Format Specification, you irrevocably agree not to assert any of your patents against implementations of the Merkle Proof Standardized Format Specification in respect of the making, using, selling, offering for sale, importing or distributing of any implementation to the extent that it conforms to the Merkle Proof Standardized Format Specification. Put more simply, to benefit from this pledge, you must make the same pledge in respect of any of your patents that also read onto the Merkle Proof Standardized Format Specification. Failure by you to provide an equivalent pledge in respect of your patents that read onto the Merkle Proof Standardized Format shall entitle nChain to withdraw the benefit of the pledge provided by nChain to you in respect of the Pledged Patents. Any such withdrawal shall have the effect that this pledge was never provided to you in the first instance.

nChain will require any person or entity to whom it sells or transfers any of the specified Pledged Patents to agree, in writing, to abide by this pledge and to place a similar requirement on any subsequent transferees to do the same.

To clarify, “Pledged Patents” are the specific patent applications and any subsequent issued patents listed in the table below. nChain may by providing written notice on this webpage, amend this list of patents from time to time, at its discretion. References to nChain will be understood to include nChain Holdings Ltd. Only the Pledged Patents listed below are subject to this pledge and it does not extend to any other patents which may be referenced within the Pledged Patents listed below.

This pledge is not an assurance either (i) that any of nChain issued patent claims covers the Merkle Proof Standardized Format Specification or are enforceable (ii) that an implementation of the Merkle Proof Standardized Format Specification would not infringe patents or other intellectual property rights of any third party or (iii) that nChain will add any patents to the list of Pledged Patents below. No other rights except those expressly stated in this pledge shall be deemed granted, waived or received by implication, exhaustion, estoppel, or otherwise. nChain makes no representations or warranties with respect to the Pledged Patents. This pledge is not an indication of the value of an arms-length, negotiated license or a reasonable royalty.

This pledge applies to the identified version of the Merkle Proof Standardized Format Specification. New versions of the Merkle Proof Standardized Format Specification will be separately considered for addition to the list.

 

Merkle Proof Standardized Format Specification

This pledge applies to the identified version of the Merkle Proof Standardized Format Specification. New versions of the Merkle Proof Standardized Format Specification will be separately considered for addition to the list.

Specification Version Pledged Patents / Applications
Merkle Proof Standardized Format 0.4 GB2009798.6

We encourage you to read the Merkle Proof Standardized Format Specification

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