Nathanaele Koll (born 4 April 1992), known professionally as Nathan Trent, is an Austrian singer. He represented Austria in the Eurovision Song Contest 2017 with the song "Running on Air" finishing in
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 0x616fdcedf8ab98058b9ccd68520ab5e18432d3c80131369bb0c90cd1d84bb521. 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/1848395a-e0f7-4807-a2b9-0cc547d216e5.json and https://artists.proofprofile.net/proofs/artist/1848395a-e0f7-4807-a2b9-0cc547d216e5.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 0x377bb036d4712afd85b090bd699d1e5f478bbe9aeabb424134ff2a84aac18674. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ATEC51700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abe28a83dcf7ec168cd6d82c8674a30165199d0608aaec56b34da610740c51c. 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/ATEC51800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0acba4457a333bf52d1d7b301007c8517569478f87e97993fd29e12589cb1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ATEC51800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd760c67e9e86953cefc527c9eb43896cf0643e99d56b4fe50ad2859865e5c7d5. 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/ATEC51800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a7b68d097fa997c18a99ac66d49b1cb765e12870f011d7d9a1cd91f61e0923. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/UK6KW1800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a84a55b0db96ef7084aaee50115ae607d5f81fb209a0dd59280183cc62344d2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ATEC52100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258bb6a5606360effa864be3d5873038406cd8486b5ba841e15df04e817eb66. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/ATEC52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08516996326cbf5d7f17932899669a0cab23167255c5969fad9381953ae88e20. 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/ATEC52200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe258bb6a5606360effa864be3d5873038406cd8486b5ba841e15df04e817eb66. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ATEC52200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853ea081f0c1630f9360fb0ce3290f1fc91850c7d36c12269c511ecb77240116. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/ATEC52200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cb425bd6979d162b1f108ae4781139a1ac69ae6c2ae2ee6162dc99edbf7f8e. 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/ATFV72004101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390234271485684edb4e05853acde80516678b5ea304276b577196327d91bbdf. 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/ATFV72004102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81bc4c0adde9dee5e5a7e7e0c21735947fe96b218263bb4a4842af4fdb19ad3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ATEC52400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0cef328a27d3b7e6ddec4139eec18bfb43147eabd8d6e896a840a65745d88d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/QZMEN2403835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298014f0acc3796818361ccea91fa108628ac39aba29d38282874bf08e9f5ff8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/CH7812410944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62e15a2158de66ffcf3c578bd0e359f7b9b45d3ed2afec865fcc38e00d66e01. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ATEC52400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a422731e3e96f20e0130c415d7c9b1fe7c320ce47fcd3fc329a63e977b33be6. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ATEC52500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef60df15e86c27d9f694d1cb3abb29dac405c02052720acfe2e442695363974c. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ATEC52500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7ebe231e29dd05b7cdd030e0cd6b9157ea03048aa842ab941a01ceac410e31. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATEC52500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de8be63941b3aaa7ace7a2189cf1fadf2d11f939853a6010c4dd1fbb9700479. 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/TCAEX2003100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f14ab580e9eebd63129f4823960aa948697a45e79174cdd175f485cbe3447c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ATEC51900002.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1829ed484fd51b05f7046039d49be24e9bab8e510b150cef39857c6ef21896cc. 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/DEA622303309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1829ed484fd51b05f7046039d49be24e9bab8e510b150cef39857c6ef21896cc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEA622303309.