Sergey Sergeyevich Trofimov (; born 27 July 1995) is a Russian speed skater. He competed in the 2018 Winter Olympics. World Cup results Podiums DateSeasonLocationRankEvent11 December 2015 2015–16 H
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 0x1361bb39528a122fe54d6d5d41998bc9b8424e49dad1b9002f8e108baaa35dde. 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/2c3abcce-b09e-4f11-9adc-a0890d4a1d49.json and https://artists.proofprofile.net/proofs/artist/2c3abcce-b09e-4f11-9adc-a0890d4a1d49.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 0x47299e7cc4e7148a0493bdb70a54a15d8938b5afb183a458db4024963bcaa327. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/RUB731302835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae62079e9de8a13d38db876636f088913f16bcac82276f8d134dac5310cad50. 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/RUB731433317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4596d712e3977c070a472a990583c41101f31273ee042884db4239d0190b14. 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/RUB731433319.
Аристократия помойки, ч. 3 (Девальвация...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7dcd5fc65d208b62bb3bc3562aa6b80ac192d188cb295610f2b58c94c9cc461. 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/FR6V81481168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af1becc46dea5a78dd0cc1a7f5ce06dbcae123e39260edeafd02757a9b54939. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-15T21:33:28Z), 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/FR6V81480608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c7a7877a9e39ae5f4ffbc43d17d6acf25983ced270242831a7aa5f9f4cc006. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR6V81480613.
Аристократия помойки, том 4 (Основной инстинкт...)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd90c7ac04247821f31bb36dfec524b16c2e239ecc2f3e7f32d5b98a194e611a. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/FR6V81502546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f84f3c92e9977f739fda8502aa207e15b63260ba09e8a909128000ec893700. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/FR6V81554330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbc754a63126d5a9e7697bfa4d11797e0e39d26f0628c110ea7a958fe4c5eab. 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/FR6V81549337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e72fcfd2bb028ccf3f19856e72b8a8b44d259b9304075dafecd2744e40704f8. 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/FR6V81549341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06dd253deaf1207e454212f853a039c8992d2099be1f603708e82c97dacdff6. 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/FR6V81549344.
Посвящение Петербургу (Живое выступление)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e10332256d52b3f49c14f0ec86bccf15f8d7e9491c939c4edce3270d5ee1be. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RUZ520002679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be90ac4f7d05c47942c85e58dae79cf85270161e7bbd122be5db7d3c9fbd413. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/RUB731302811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386e6fcfd3164ee1d36877e770b587b7057f6a5b29c75f6e2f598d8ab056f28d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/RUZ520002658.
50 Greatest Hits (Bol'shaya Kollektsiya Shansona)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c16dc0c7efade85a51e6d3c15845268bb26985337451841a1e0aadedb6fb55. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/RUB731403042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb2737da4d73efa86159230d831461e5d2f206901d11c580024b4ea9a1d2e79. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUB731403052.
Grand Collection: Сергей Трофимов (Лучшее для лучших)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e01ac4461e496d1cea5540f30ca9bac8eb6d4e433a13a220080ef2d8382ccd. 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/FR6V81480975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4fd4e8c948c4cb2bcce77fb5bffe8929063e778e48c9f5c41eb53d6b0871a8. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/FR6V81549343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5219c9371af64ecd54d70154b5217da1988f28e067ab4c7844b2ecd9cabd8d8c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR6V81480606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f84f3c92e9977f739fda8502aa207e15b63260ba09e8a909128000ec893700. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FR6V81554330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8829a04f54b593d65f3c0abb5a8c93880d68027976a1040da3d74b2b2732be2b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR6V81480763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fff389cf910e09cbdce1af228b746d0820f2e0e3c9bb239f33e043316e9cfb. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/RUB731302776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8604a7424a12de2646f4dc1ea79220af3d37ea353c825df5107971f8ebe3b1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR6V81520005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0c54cd8cb8a9958391b242d2feb5e8b20be5ea095e84f1e12b6046cfcc9292. 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/RUB731404073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe69c6a476cea4adb793c00a94d5021d35ce4cc553f5f7abe00a3de41ec90f20. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUB731302824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cfcaea62c9bd882423738ff7ad8f7d10be38ad0f5f1b28844b5c8731b781db. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/RUB731302777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdaf656329106a460f834ad78b881bfd64284f7fe4d3b76cda7b3d8f98129d91. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUB731500249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a03b3c438c0e379c365fdbe5862337ba2e5eb9b87a5e00e9aeb034045f1d1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUB731403038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a9f1c40195f1a0e044a5d03464db99479a2eb599f3f04fc84a7feeab2d9472. 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/RUB731302819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1f909b67df84aaae11c803096ab88c829d4e14f87c02e8ada273021f5b50a6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/FR6V81480766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e72fcfd2bb028ccf3f19856e72b8a8b44d259b9304075dafecd2744e40704f8. 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/FR6V81549341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13cf1526f87c78a59590bf358a27cba06a409d8ba81a0407247f7219169f4c20. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/FR6V81549338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c7a7877a9e39ae5f4ffbc43d17d6acf25983ced270242831a7aa5f9f4cc006. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR6V81480613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e8e0a9cfa0d21b38934482037b063e8fd2e7e679d3af8ee3095529c5c86055. 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/FR6V81480769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9b823a5d7c0bbc4c7e9775c3c3438687806e21871331668000769aeb547f89. 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/RUB731513723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00662986490ee356c6a1fd3b8b38aa1aaca88f03b6e9e02f49b4e00bf211df4. 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/RUB731521081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446430054e477dc097457ff2aeb2fbcc8832a3cb106cf4b781e413d2276fb7af. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUB731520758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6ca9ec9c0d7a06e6984a6e11e3b071d06dae19ceb6ce0e0b9a4e2053c1a708. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/RUB731521099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c0cb9be2c90b073fb68be8cecf215731d33bf90a4c76cabeb700d92a9180bb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUB731536269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fc806469deb3b2611197abc6d8103620eb0439e2fb068da590938683675b35. 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/RUB731900466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358ed2b5fd9265b1b7b26067edf94b7c373537a55d8bfb40e7f53b3d35cad927. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/RUB732079681.