International IEC ISO Standard ISO/IEC 21617-1 First edition Information technology JPEG 2025-01 Trust Part 1: Core foundation Reference number ISO/IEC 21617-1:2025(en) @ ISO/IEC 2025 IS0/IEC 21617-1:2025(en) COPYRIGHT PROTECTED DOCUMENT @IS0/IEC2025 be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISO's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: copyright@iso.org Website: www.iso.org Published in Switzerland @IS0/IEC 2025 - All rights reserved i IS0/IEC 21617-1:2025(en) Contents Page Foreword. .V ..vi Introduction Scope. 1 .1 2 Normative references ..1 3 Terms and definitions. ..1 .5 JPEG Trust framework 4.1 Description. ..5 4.2 Overview. ..5 4.3 Trust Record ..6 4.4 Trust Manifests .7 4.4.1 General 4.4.2 Components of a Trust Manifest. ..8 ..8 4.4.3 Details of a Trust Manifest. 4.4.4 Trust Declaration. .9 4.5 Trust Indicators .9 4.6 Trust Credential. ..9 4.6.1 General .9 4.6.2 For media asset content .10 4.6.3 For Trust Manifests. ..10 4.6.4 Claim .13 4.6.5 .14 For claim signature. 4.6.6 For verifiable credentials. 15 4.6.7 For media asset metadata 15 4.6.8 Example Trust Credentials .16 4.7 Trust Profile 20 4.7.1 20 General 4.7.2 Trust Profile information 20 4.7.3 20 Statements 4.7.4 .21 Expressions 4.7.5 .21 Predefined statement IDs 4.7.6 Examples. 22 Trust Report. 4.8 .27 4.8.1 General .27 4.8.2 Examples 28 4.8.3 Trust Report generation procedure .31 5 Media asset life cycle annotations 31 5.1 .31 Overview. 5.2 .32 Assertions. 5.2.1 Description .32 .32 5.2.2 IPR information 5.2.3 Using existing metadata standards 35 5.2.4 35 Actions 5.2.5 Bindings (hashes) 36 5.3 Assertion metadata. .37 .37 5.3.1 General 5.3.2 .37 Actors 5.3.3 .37 When (date and time) .37 5.3.4 Extent of modification(s) Embedding and referencing. .38 6.1 Use of JUMBF 38 6.2 Embedding manifests into JPEG assets. .38 6.2.1 Embedding manifests into JPEG 1 and JPEG XT .38 ..39 6.2.2 Embedding manifests into JPEG XL @ IS0/IEC 2025 - All rights reserved iii