{"_canonicalization":{"envelope_id":"axm_ + sha256(envelope minus {signature, axiom_id, anchors})","envelope_signature":"ed25519(envelope minus {signature, axiom_id})","json":"sort_keys=True, separators=(',',':'), ensure_ascii=False, allow_nan=False, utf-8","leaf_hash":"sha256(0x00 || canonical_json(envelope_full))","seal_signature":"ed25519(seal minus {signature, sig_algorithm})"},"axiom_id":"axm_e9183a57b710f87a52ccaa5ea5dce357b522f1c404e4760fbf764132b9c9827f","bitcoin_anchor":{"bitcoin_attestations":[],"calendar_attestations":[],"ots_url":"","stamped_at":"","status":"pending_next_stamp"},"envelope":{"anchors":[{"chain":"crovia.axiom_graph","height":0,"merkle_proof":"spider_vendor_press_v1","root_at_anchor":"spider_vendor_press_v1"}],"axiom_id":"axm_e9183a57b710f87a52ccaa5ea5dce357b522f1c404e4760fbf764132b9c9827f","axiom_type":"AX.OBS","body":{"axiom_subtype":"news.vendor_press.v1","category":"news","fingerprint":"deaea9af580969fc2bacd3980c92ca97ee6f52daf440d62e95f1ab79dc46435b","published":"Wed, 03 Jun 2026 12:55:11 GMT","receipt_hash":"deaea9af580969fc2bacd3980c92ca97ee6f52daf440d62e95f1ab79dc46435b","schema":"spider.news.vendor_press.v1","spider":"vendor_press","spider_record":{"axiom_subtype":"news.vendor_press.v1","category":"news","decision_hint":"POSITIVE","envelope_target":"AX.OBS","fingerprint":"deaea9af580969fc2bacd3980c92ca97ee6f52daf440d62e95f1ab79dc46435b","observed_at":"2026-06-03T13:43:26.668713Z","parent_run_hash":"2957926f69b319ec629d53f22db8280938dbbccafacd5ee456dfa9f2715a9ceb","published":"Wed, 03 Jun 2026 12:55:11 GMT","runtime_version":"0.1.0","schema":"spider.news.vendor_press.v1","source_status":200,"source_url":"https://huggingface.co/blog/feed.xml","spider":"vendor_press","summary_excerpt":"","title":"Direct Preference Optimization Beyond Chatbots","url":"https://huggingface.co/blog/Dharma-AI/direct-preference-optimization-beyond-chatbots","vendor":"huggingface"},"title":"Direct Preference Optimization Beyond Chatbots","vendor":"huggingface"},"confidence":{"method":"deterministic"},"decision":"POSITIVE","issued_at":"2026-06-03T13:43:26Z","notes":"Spider vendor_press (news) news.vendor_press.v1","object":{"captured_by":"crovia.spider.vendor_press","primary_source_url":"https://huggingface.co/blog/Dharma-AI/direct-preference-optimization-beyond-chatbots"},"predecessors":[],"schema":"crovia.axiom.v1","signature":"ed25519:2c429ceacc153c8d2ba2452c71db89f140567542ff9cdfb28af06a6a0c21bd4397fe182cd2e55d4740ab26d71806e8de6a73995ac88d8d3aed0479ac70727505","signer":"crovia.substrate","subject":{"observed_at":"2026-06-03T13:43:26Z","source_collector":"spider:vendor_press","target_id":"https://huggingface.co/blog/Dharma-AI/direct-preference-optimization-beyond-chatbots"},"tsa":{"authority":"crovia.substrate.bootstrap","rfc3161_token":"{\"kind\":\"crovia.bootstrap.tsa\",\"source_jsonl\":\"/opt/crovia/spider/data/news/vendor_press_v1.jsonl\",\"source_seal_merkle_root\":\"spider_vendor_press_v1\",\"upgrade_path\":\"Sessione H \\u2014 OpenTimestamps weekly anchor\"}"},"zk_mode":"clear","zk_proof":null},"ledger":{"leaf_hash":"a9b1794f11e6905e0bfb88e1eedbf9c7a226ade4149c3ae0fd26f32cfa246ea3","leaf_index":210701,"ledger_path":"/opt/crovia/substrate/axiom_ledger.jsonl"},"merkle_proof":{"hash_alg":"sha256","leaf_prefix":"0x00","node_prefix":"0x01","odd_leaf_rule":"duplicate_last","path":[{"sibling":"3b42eac62e235784a7cfabeb9efa400b0df59ebe53791870c6f59e7ae1b021e6","side":"left"},{"sibling":"1f09fa5b053d6b097dc97218d7be76da3298925f6b041983b8d719740f413fa4","side":"right"},{"sibling":"7d3554a5a671c98e0caee2be4847dd83f9e9e03f34ba751c3426e9586b9266a1","side":"left"},{"sibling":"0b7814406cb2a1e27d7827261013472c43f0776e65a1b8696993fabe2fe2e08c","side":"left"},{"sibling":"9bae79de53d92ed2c68933b127dcea60e82d1534010b53c8ddf7da073b0464c2","side":"right"},{"sibling":"1d0efd4e65468c33e1ff33ef005c7eece8973f4504164257f8047cc466546ab8","side":"right"},{"sibling":"3ecad0d31bb453bae7f0bc040f7cf7e6376aa58801f557258d76dc58ef605624","side":"right"},{"sibling":"cf88725d8856b8cd8d25f02be67c3ba2d5d347912ea17cd08ccf6669b26b91bf","side":"right"},{"sibling":"af6308b9f2a9c7d51673c2c58c0d744ce1285fee1fecab7d47a622f49af5c1fb","side":"left"},{"sibling":"f47f72f1ebbd24fa44ae30a9fa7ea0c5dded7d7d5c5038da1c88c0d7b8ea19a7","side":"left"},{"sibling":"cfee1a7622f981fb56f9955f72601abf752988a8dcdf87a0daf4890f95802a59","side":"left"},{"sibling":"9e628b056b0ca906929f96e375a1e6c96a2f84b5267c3da78b377da531af639d","side":"right"},{"sibling":"2dca509b3eb767a47cf215d4315f230ce9103a76264412008ae23a349b519ef1","side":"left"},{"sibling":"24d1bb4b13e0e46131b27b70a48e65fcf4e2e14b95e3bb83ade821e9df530f6b","side":"left"},{"sibling":"f4c34191d8de4f45444f98e7dcd627c09b7887b87685e7874399e2cf8fff47bd","side":"right"},{"sibling":"73b1086320144fed3f05974ec24395f82caf6f9f2d0df1ef1afc07c335b13597","side":"right"},{"sibling":"c300cf0154c136afc09b1702a0be98f4ba5b6dc5cf57e8cc714ec1eaf4196eff","side":"left"},{"sibling":"d841ad93efda0869e5eb97678f348f03f5caab4353e05ff4bf18f47fb945b822","side":"left"}]},"schema":"crovia.axiom_proof.v1","seal":{"first_collector_run_id":"","first_receipt_hash":"","jsonl_path":"/opt/crovia/substrate/axiom_ledger.jsonl","key_id":"430895f101d38164","last_collector_run_id":"","last_receipt_hash":"","leaf_count":210818,"merkle_root":"c7e38307382ed0570e7b08e53b3252f4769754c0ccfdb5abc270e9e1d024758c","public_key_hex":"cf742e26f75669dc673cb5c0786a1ae23ae8ca19c347317192ce40c28a7ff25c","run_id":"hourly_json_retrofit_20260603T143701Z","schema":"crovia.seal.v1","seal_family_version":"crovia-seal-family/1","seal_kind":"substrate_batch","sealed_at":"2026-06-03T14:37:47Z","sig_algorithm":"ed25519","signature":"9f557878e39a6c06de637c25a9a7072aff9ca4b473a480cf7a34d7185515657d9e65ec624871391cf1579ea69ad1ea25ed40298226ab4b75558600ae5406a400","signer_version":"1.1.0"},"trust_root":{"key_id":"430895f101d38164","public_key_hex":"cf742e26f75669dc673cb5c0786a1ae23ae8ca19c347317192ce40c28a7ff25c","signature_algorithm":"ed25519","url":"/registry/canon/TRUST_ROOT.md"},"verifier":{"spec":"/registry/canon/AXIOM_RECEIPT_v1.md","url":"/v/axm_e9183a57b710f87a52ccaa5ea5dce357b522f1c404e4760fbf764132b9c9827f"}}