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They allow users to embed customised content within Bitcoin's satoshis. The token frenzy reached a market size of US\\$2.811\\,b (2023Q3--2025Q1). However, this intuitive design has not undergone serious security scrutiny.\n  We present the first analysis of BRC20's \\emph{transfer} mechanism and identify a new attack vector. A typical BRC20 transfer involves two \"bundled\" on-chain transactions with different fee levels: the first (i.e., \\textbf{Tx1}) with a lower fee inscribes the \\textsf{transfer} request, while the second (i.","authors_text":"Lin Zhong, Minfeng Qi, Qin Wang, Shiping Chen, Tianqing Zhu, William Knottenbelt, Zhipeng Wang, Zhixiong Gao","cross_cats":["cs.CE","cs.ET"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CR","submitted_at":"2024-10-15T05:33:16Z","title":"BRC20 Pinning Attack"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2410.11295","kind":"arxiv","version":3},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0d60f0a56f1baedceedc00f414160813263ff80114f1af69e4cf6c68e579575a","target":"record","created_at":"2026-07-05T11:16:29Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"7f596ce8255eb10931a25a36e3529d10006f55b2afe2097223b12ca2f29cd71d","cross_cats_sorted":["cs.CE","cs.ET"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.CR","submitted_at":"2024-10-15T05:33:16Z","title_canon_sha256":"1d6fb9389a7ba729d25bdbdbb6535659988d943c889244f14c4cad35608cd803"},"schema_version":"1.0","source":{"id":"2410.11295","kind":"arxiv","version":3}},"canonical_sha256":"452a126e9aa9c98f263293ec664b08eab2fb18b7662ad0a721c00979e6471ea9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"452a126e9aa9c98f263293ec664b08eab2fb18b7662ad0a721c00979e6471ea9","first_computed_at":"2026-07-05T11:16:29.913565Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:16:29.913565Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RsHpEbVENStj9qp+Dvglzc6gWj6FYyMhRwq2HapDhf42LSuCCSVGQ3ZCDllo0/RGnwo5LFXXEZ7XBnRyXgPWBA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:16:29.914127Z","signed_message":"canonical_sha256_bytes"},"source_id":"2410.11295","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d60f0a56f1baedceedc00f414160813263ff80114f1af69e4cf6c68e579575a","sha256:5f940d2b5669d9cb718fd5c01bc41a2d3d77d2f1f4fe73bc3455f982e5306ace"],"state_sha256":"039031e23872a6cf3ecb36b972bc59e6b439ed334c36c794d445d23de7859a0e"}