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 0xd78e952d9d437f750a81a25ad715dc26aad17d112bf6f3f0df58124608b010f1. 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/7738fe33-10b7-449a-816c-c7cc11ac347f.json and https://artists.proofprofile.net/proofs/artist/7738fe33-10b7-449a-816c-c7cc11ac347f.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 0x27cd08557a23a300c351fe983a3cd3fbdc1f40201b0a66b02257550a785bff11. 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/QZNJZ2396169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c41c91e50ee7db4ff1c9429a6980b2e84fb898c05e6e9f339952cb369943cf. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNJZ2396159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25351912f3deb9e15d760fa232551290483280e8dd53117a70ae7df77afea719. 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/QZNJZ2396158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e67096438afa81f962b00037f178eec0df307867ae9cb20f7e4f1ec790f46f. 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/QZNJZ2396165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e84a00e5d78b7af81cb48cab43241df1b8e137e0c968501114ef4a9eb8d1c52. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJZ2396166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369b2d541a03987232bf61548c878bb608351902f612b0bc7e1d843b747d4516. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZNJZ2396164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57f881efcc4f34346b5849d0dfef59d9032eb4073ee29d1b261fbf20fbcdbfe. 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/QZNJZ2396163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcd2a5928ab643145301e5365962300a29cd72ef0194d322eee33e5e4cb5cfb. 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/QZNJZ2396162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697a515ac4679ae42d648deba14bde3b37025656129311420f594954ad5ac39a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZNJZ2396161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dffda332df52c8180fcd8b4e37394fc4b762a1eeeb82f6cad32f6b230f360c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNJZ2396160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7a5330d15bd7717424eaf8a737074aba38b2f8d910cfbf8aedadd05da19fac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJZ2396167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf325f1add613657a2c409195146dc8abb16c8b6a5759f3be1b53c630f19cb58a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZNJZ2396168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43631df40c45e2a659990a7adf4fefce1db45b80650e002b5756cc22e6ff38a7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZHN32113414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec86a1390b75f6bac876cf7941394cbec8badd229d2798db558746a8fe4bb7a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN32113415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0609a2db1ec5e5f8990db15a8f4e09e21ec393483519840f35fd16db3876e2d3. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QZHN32113416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d47e7fc6ff590f8f06ab69e34b1d8fb1e25a72b548517bbc9bb0721b698420. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZHN32113417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729d6b507d213611710b87d1dfe994ed06d911630bcdc790fa89870688e9686b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN32113418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06dbec205796b597d7857ea044b974eda22b4940dadfa39d5bcf0376d35c5740. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZGLS2465677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba381d8bf71f95814d25b8950ddbfdfec4d9f92cf07fc6fa61376cfb4278f62. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZGLS2465678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f8214aa6d145c67105afdbc10593fd4a81cde2866df0193cd50c9ce4d8e280. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZGLS2465679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6985f69bb2f785b0a0b13a5707d307736baee1416bcc388f3fab6336aa640430. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZGLS2465680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6073751d29153a28ce8446bdaed61c8e5e43d2fe5bf5f8348b1325324aa28232. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6Q2481328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0da28d77549520e228e2c6cf87ad02cf0543415f08406cfd05c87ac8a439d7. 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/QZNJX2310091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb9a6960ba2f1d77b4f76c607e9a2011e65a13cb5f32013c4cf2f08e0c9dc47. 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/QZNJX2310092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9507c77cbd23862a1a3dabb2f12ec7428387c84e0e90da825a95123bc6740764. 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/QZHNC2336550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ef11b71f6e2e75260285367a2198b53bd193fe8ba840d8e804a5ba4cd71e68. 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/USANG2254060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cbf0408fec0e51bf7d85beec0814df78d21cab76ecf5e9e57c029298480a98. 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/USANG2203535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b735e279b36083dd0253f2cc65f89e6dafc6ba1bf5a2a07cc43b521dfa2e9ab. 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/US3DF2273930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c598510c8820b25d4bcc21532f2b1aeeed86e299457c2f64fd9175fadf407c4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/US3DF2251285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf589e7696e36656dd6c9e201f4453b282f22bc29e02e88f3cf858375ce742802. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZHN92273231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9aa690d711dcfd93b3fd22e6ff81984d2df56fa33419ed046e384e1f820030. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZES92294225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf605052fc3b8364fc55aea0e7620737d42b719a9b8d90db063e10aa7662861. 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/QZDA82225800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051b70ea9d9253210b3822c7ade3e39cc302874d8ff2a2fd8c3c9e0472340af9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA82225802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd5a69da73b7b56766c71e85a3bd8931f0c78854d64035e08e6d8d1e630f59. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZDA82225803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d21bbd450fb5eefa890f8ed2503d819c54ec64f1e321c9224cff29105213f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA82225804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d4e7d430fe189c48ba71b636d4a66f4ee05307fff66aab8a3db8587565772d. 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/QZDA82225805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d72dd3395fc42c964d529997ef6ebd4e1f5be7a3c48fde5a650d574028b67b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZDA52235093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b1bb243690add93a0065660258af5667bced0a4daa95e74ad68499f2a26a07. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZDA42217969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901853c489c9c6cfc4a730b4226639c4df97efa76ca0a2cbd6bef14ed1faf740. 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/QZFZ32252467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5391ee207aff25374c3a64b5bc53d1e6d38e49c4b29a99494ee5b9e764ad2249. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWW2148486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeee1829130e2e3e9856cb39176e0f31623c40ae986725920ac6dd1afee86405. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWR2097723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb630d05ff1975d2d87494704304cc73e44f1267ebb9e3a8a7082e604d41fc8e6. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZK6P2070983.