thumb|Ikeda's sound and light installation Spectra illuminates the night sky every winter solstice at the Museum of Old and New Art (MONA) in Hobart, Tasmania, Australia.|331x331px Ryoji Ikeda (池田 亮司
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb300457c305b21150256a9ee6349eb886b7e75d6d0d65557200ad3d7fbbde0. 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/d7de14c6-cf36-405f-8049-969daab344a8.json and https://artists.proofprofile.net/proofs/artist/d7de14c6-cf36-405f-8049-969daab344a8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ffc524f4d2d39114dec5db1fbb0fd1117bb65293a3f0f300b12feef26d11ab. 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/DEAS90700244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca87ac9daa7ecbf84106d20fbd07a5a276f53f24e230f6977cea444fdf6c23ad. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBJYX9630201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26c04876b12fb7a4660bc595b073207edfc086089208417b0eb46333e298907. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEAS90500000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed98e1f525410909c68ef22910ae9c61c67eb86d30bfb4bb0c3e676a8e193800. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEAS90500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4087993e9a1b2521be5e66c709285fa51b6f83618b4ee80806ab5b004089b381. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEAS90500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bf19a173b51236dafac43a5a123bfb7d95137fc849ad7189b640656c488553. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEAS90500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c5c1dbe6260e1f94a661a0573b581c75e861626b6f032fa2e6ec581d5a2e44. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DEAS90500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e913d72a90846dc758bed3324ca288d7fa58cef17a15f17ff255c02d7b62687. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEAS90500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f2e2c1dd00c94cde8b2fdb25d051988265a97e47815612808e9f2226fae24e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEAS90500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cbca31161bd283cf59bb0bec73c05d9a4cf83695122bdf05ec9efeb46af417. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEAS90500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0d1e2294b80cbc211c35fe2926b359b940367e175353683698d59001470535. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEAS90500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453ea74a01b3022ba0a82471d8afd5e6e47178f602f358919b7060e8950d1029. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DEAS90500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15731efcdfbb52e37858cfba5347dcaf69d7bc1d31fa25c8c86047e4429d1779. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEAS90500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb11bb29c9b6612b0d901d0f38d60ee2aa24424258a6c07bcbf5432b0365cde. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:31:24Z), 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/DEAS90500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2333823079afc15b90201f49be4fcd1917bf0dad1a25f4c0df9f9be3b8415a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEAS90500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1c32ac8d11159cbeb1375359f8e584f8e3fb23cb2191125345b5ed7a72590e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEAS90500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b54e97aa70697396ac9d5a8ac3f51c6ef66f254a3ade39332c574601418d377. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:59:03Z), 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/DEAS90500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea87cad50c0b1a75bb0dbd6bbd166a9515b50389fc7e1a3d9a47755cc8f6882. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FISRG2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0af69be323a7afb18a9630fad9319a522beaad864f4613ef1e839705f8a35c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPZ922209606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a21d37963b0fd7bc2b638ee22f43f9358eaca3b015096773e0b19cd21e4d224. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPZ922209607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24764c29e891de1461815f2febd18c4b4ab5ab205da0f356ba7d995dd1f6f7e4. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPZ922209608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2aae255d305f25721a98e8a9d4a69f30fc80178e5a6887a046c9651294982e6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/JPZ922209609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740de0321351ed90f9bdb851e4e88ffc60193ba30b4f7463909b8775c34273b5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/JPZ922209610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ad1984919e1c4d8d934f5bc7557988f9ca23e85afef7eba565080e01c2e3e8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPZ922209611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40837f9adec5bb38adfc3f4d4635a53368753c4947cb2ef845294cd9bac2ae07. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPZ922209612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f0b843e17c3f0c1e12a0e2f91f2c17ffb3ab076dda47ef195bce35493fc4a6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPZ922209613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45c8164d3b90dc94a1444b5950e88167bfbb560adea3b44383efc69b9865ee5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:27:17Z), 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/JPZ922209614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa235266afbf1578085f1d091d71e8b2c0a31e6cb13bcf497c51a0e42200a320b. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/JPZ922209617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9d347903fbe61c91998e9db7e32fa106c75c22ef526a1ae529058aa05b247e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPZ922209618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c100ffd514ad698299a21afd25f56dea83bf276bdebe40775b06b47849a589. 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/UK6821719202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daaae56db50408f38c66d99f9d6d7d065920a2ebaab8e863268b655ace09a44. 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/UK6821719203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91c12e7631cc704575f5342ec5b77bb83c5fc3cf545feb504b50ab6b3806d42. 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/UK6821719204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8548fb857450eaa4b70c6f7e48eb9588f68eec2dc1dd029f914eff22012564. 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/UK6821719205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f28280027991b555014829ab88036bf00f5d71b9e1fcda39fffb60920af022. 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/UK6821719206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d77db06f5ce274aaca0c2b687a196240e1872f72acc0ccd75880f550f72a2ab. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/UK6821719208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4199248f940c861326ccd81b1644af3157e5d63ef63c06c42d953209ceb1407c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:52:48Z), 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/UK6821719209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b1108442e7982a174ae27db885d3b2eb715d7f4bf04c5525d06e9d8c6141bc. 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/UK6821719210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2693c27ebc67968789025c0e2194355a6f7d40346cbebf3de190ddf1f4536da9. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/UK6821719211.
Sound Unbound : Excerpts And Allegories From The Sub Rosa Audio Archives
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507b6d267929341544ee0cb63ef93fc22ac0da2132f0f26ed96f3c8535e3fe3f. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FR6V80803764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6ba28e584ec0df6fde229ecfc3bdf524c8e6307c9b9d0b109e8c53b1af8641. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/UK6821719207.
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 0x06457fec7ded01ac6d549246e0db3f10eac30591be9479c9a50bae7d3abe022d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/UK6821719212.