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 0x23ba70b9fbdc1e338424412d67001e8883a3276a7de5c33048a86b756e2f1a0d. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efe3e2f3-0a85-44df-9ab1-892a24c8ec47.json and https://artists.proofprofile.net/proofs/artist/efe3e2f3-0a85-44df-9ab1-892a24c8ec47.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 0x071fb55e9fa1bec83202229187fc734b856ac12f7cb50ca32657b8c60f3467cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN72021829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617605d0d60d6c87d9492509074ebe3be8be66b8a063c628addc2fada3c140cc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHN72021830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf424b6d171f6ae20c6dfebd5945efcc8294fddc8fb176b151ac24319f244285f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN72021835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b9c11a04c10d63de8c47b72aa2ac27aba9ed01cc736358e9b5af6e2e07e696. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHN72021838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22bfc30cda934597a27fab70ea3b5776911ab2249d101a9b5b51001608b4255. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHN72021841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe519c8a18895713294769d33718e180656dd64690d3942d10ae980a62265afaa. 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/QZHN72021843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29084a5ec9ed78cace0ccd3ed1276ef4b8bd4405fbcfe09883164c5e31dd5e9b. 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/QZHN72021849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf486f8f4d8a64e18cf83be3cbe0e57f1a557323d93a2e3770393f6327e17de06. 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/QZZ662432781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c64925c3256a42da3cecbdd5945387c234e3506a8ebc70d8f9fa2079fd07a5. 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/QZZ662407165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7170c6096c9f30b8d0bf656d89b0ebe18d039da134385aeef354284fb4b328. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZZ662372081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede147c7b729b8419b51d3096b8cbc3c4480083aab78625ecf2c8f259d67b323. 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/QZZ662331643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0453c7c5f34ca8a9f7f52a523e36c6aee061d051f4ccf32800ef6ec6fcc31529. 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/QZZ662313443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd994352102e9ffe794dc8fdbe647b5df2b3195853454643b7d1886beceb032. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZYFZ2392347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867820566d19f276485f49f7f36fb400feb90afbeed55e5aeace2f1f954dc523. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZYFZ2361623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70586d87a45804d558de8abf5c77c0f04895b96fc67fbe13b475c30d5cbbd771. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6F2286230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6c010b0a8a9b983ae3d00a06645cc50ab0aab1327321c72f9a58b91ed45d86. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZHN42287828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40051f6b74f89bccf612ccfadf74bb8477b488346b30df317a8d4838402821c9. 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/QZPLS2118273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b828ed386908889c5ca8944b8f58fff4b2d9760e1ff2e0804c06b8ded238c52. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZMEP2144085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80175c1d1c58b3b1906775bc95dd86348c0b2c5f3b5726cd9e3582b4ce9af828. 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/QZHN72151285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1c8bdeb03a8c2c158fbc39c3f5307fb821efd0aed2e5ba0ac2c0d7387f28cb. 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/QZES72175522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6925e7e661203e0c4a3c17b3f44803dc286e7dd787ac7b87a5228d4e2964e32. 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/QZNWW2087760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838d2c92592b7897686e046298ad89f6668904ced1a901444d3a2b8e19003938. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZMEM2082430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb4835436e84043a7b8823380ed991c10b682ed269d698c0be10cc4f0772f60. 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/QZK6M2011451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24926640e48472f431d53aa327ce48b98de2df9baf72ac63351f97dc3e88914. 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/QZK6N2076599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc556341f92c2cd98ff1708c3908a82af209f3d233ccb34526c97658ae33e6d2a. 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/QZHN72022520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb2c12859978c079624320d9876d0ae2b68c80539a86d56f356ce81bf8871c3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZHN62036281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f314a0842887041285f8154bc0458b6e1acc62180b7e71ed730ba9b8d6fc2e6. 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/QZHN62036280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1984f84c825366488ad6bef9ac5ab5c01468c94e246fba280f97c9bba6bd64e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZN882419549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0148134ea02469a6e0cbd6006b79215220dc064a1beb8fc569b8e98fece81f6d. 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/QZZ662358508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede147c7b729b8419b51d3096b8cbc3c4480083aab78625ecf2c8f259d67b323. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZZ662331643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd994352102e9ffe794dc8fdbe647b5df2b3195853454643b7d1886beceb032. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZYFZ2392347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9baba0f43d0f2bd0ae39d4bab61efab18139661e88cd655567c2fb201a9a2b14. 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/QZN882419553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0d47cf210540441bf22be6d2463703d1a645937574680c3ff390c65d0c2dec. 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/QZWDW2426312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0453c7c5f34ca8a9f7f52a523e36c6aee061d051f4ccf32800ef6ec6fcc31529. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZZ662313443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf31cc6f9129c50b7b0497b0e4ed904aa0747c51f6cad837fa22c2df489ed7. 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/QZYFZ2424140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3430f5809096b34c62b40219bee06ea1dbf4dd440744637bfb6e16c8badc0d8. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZN882419550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24abc9e8df8f88f2ef97ccbbfe65b98a133c93d85a1f427d3298c1cc4ebf980e. 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/QZYFZ2454346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7170c6096c9f30b8d0bf656d89b0ebe18d039da134385aeef354284fb4b328. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZZ662372081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e4639ccfcbd9d8e13bed24f7e7ba78549bdc7b89036975bd916c7b68bac0d1. 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/QZN882419548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f0d238e82c96e7737ecb85945e012d7cc06a297a3543782e183bbb86bafb30. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZN882419552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e4f5a7268eb0d16495f84ac6cbb1302fae9fde6a8a4a5d7cd9b033a23a464. 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/QZN882419547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9e87d39a968e33ff584771f8019f0cbb5207a15d0bb6c63c5ebd3e3ec9f24f. 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/QZN882533036.