1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe764f5216152149b418c26caabc79bc7288b0ad0714774c85c80039fcb412. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e888a5f3-72bf-435b-8f97-ce545405437f.json and https://artists.proofprofile.net/proofs/artist/e888a5f3-72bf-435b-8f97-ce545405437f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6f538f3720b91cf7dcca77de45d89078531d205ed6e7460b70e21d047ca3a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2339622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a1ffdcb932ec7d430adac21a977a22bb8cc62f63c92800b0f604086d7f62ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62367129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7e3cae16c8fd53534076968695c46be83360417e966195aeeff851d512a492. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42302250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0e8b0f42577630fbaf8f60e23d7c9edd6efc5dec9fd0db2e29181b84e7e1c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA72318299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044d2ecfc6082d91ec2e95d85961d395a45de0283b2819857e4293784b8849fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2271009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c775c18bef938740bf91e4efaffae5e436f946a8a8698ebf0da31dc2a2658a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2231856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d32c1916fd91021193516399e99e74ce31ffda866e9f7ed6231303cf08ec1f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6L2267706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608aa1841d844b7b27fc39ef92c08c9b0018595fac6c88247aca4a09d00c9e4c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42275843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e3e96339d4331892d3cae770f78d53f392e13d121280e0546ccc61b19595b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62275665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e852272947c1aba8a15794ea99f9dfad05bed23cabdb74e804bff382b7aa312. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52237837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1753c10cdc0de5fa5896237492ce69ae085c4d6399887a50ffb5e6c500db68. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAGB2261583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e97129c8fbc43d31d8b78fc30124577a9f464e4fca75739dd9fc1aac4e3af8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72282334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244b05948191d5c15ccd7858d2d2215754b4fa2b3fd33db447b76b744a0e9dfd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWU2125847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708246374253d4fd45727989a007df561f93ea39fb80a56040b55ce5d52bed77. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2126056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6f293230f68bafa101476ea5c670dbbc925d9e507870f7a3b69da2858cdbf3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFS2180848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a464bb8296a667e61d5f3ea838eb9b006a8ea9ce44aa23078a7ddabc68a2a4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN92184802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6cbb0c6e8c83f413222b72cf86bdcc63a198811bfbbbf58083c2cd992ba21e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN52174938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5bfe1cfc3dfc95bc40b09be1e3c94da4b14d1280348cc108347024bab48c6b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42131613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca41d6fb854f124f6bc5fbb1a3f9fd118c6e41e47630eb04780acb8cd3b72907. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42121959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aba3004e80e08f5463e01ce581673ff36683e818dc44e6363b12ac256993f2a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFM2124090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2123bea3161faba9451581b6b363d2d1c92c2333fbc4849beb893ae4dec49584. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFK2151564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936d2c83c8963476fcacdeba2d8475ccc50e90a58036932b55f2efd906c404d4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH2125393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8bd5344af1c562de8d640bc5757ecd4f5f54d30522ba9f7314ff385a470fc7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFF2062106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ba1da12ce8dbfde0f00fe3ee82ccc5d4b4f468010a1a952b311ab8595106c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4R2098975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c3769618bf28d57cebd916d48b841a4a63ab64d75eb504b8294b4db49247e6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2064689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7ac4f724d98bac23f6f180a7f3475926ce7eff08617461dd2859b7e4537746. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFE2018102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3fc31ce11909f25d86d1e211ac584b771e3e43d7291b5680f67f092b569b7e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFE2027862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5875cc34b9d77a90b784fc343a2d7ae0e58eef705ac409c17f6b586ca553a565. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFE2008058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e79994ba62c2d40b9cf0b14ee6f8ca31b9e1dd1e665f19c290d9c36a3b9a6b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q2074151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845a698a0c7cc3c48a5b05c28ee9e154c35f446cee4d35341edb2d6b239fab74. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92023294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7bf2826dcd6c93dabb46346d8c94909022f5eabb7082cbcc6d1320f3eeb0be. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82060956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7738a65f42c2ede3b0da7e1c720744f00b1d96d7caeb65aa703c01cb5c076a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42085501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902d5f23c49041b9b7e00fdb315eecace3d1064bf13aebd32cba3749daa942ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2067254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6cec401eb7fa31d54a0a08a5024cae6eff099b8536bb0d4e166cc93a70ef11. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2052391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d97704db3d5ed8097e9c83acb77de827935e9450164def59380d92912777f1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2007995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd715b9b8bc119b3382cb5cc671c47d032a2d3a039502c05737111e7e2d011d2c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH2094203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6218f32ecf8dcce9e93f8920f4c796e7ed9598d5a6d60a60d59b386bc067cf6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH2038255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fab4b9271a304f7046dbe580db27e7009814314a34dadf23c3958f30008278. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH2015986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb559ba08d57200c54e852dc3421252477787118e8b3f5d22eda47b667c32b1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6M2436035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c7b1084aadbab533954755513c9842e7ca10f918bb8ff785bd7d7c6b19e5e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN92437141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12b3ba83ec8a7a204af1aaa7a32a95928cabaab2bb191ab9fcd822baa0186fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN62446579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836e74b949ca9719b929bb588958143924016b9ff1ebaa3525b41ad30c785496. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA72411407.