Serhii Mykolaiovych Babkin (born 7 November 1978) is a Ukrainian singer and actor who became the lead singer of the 5'nizza music band, the coach of the Holos Krainy (VII and VIII seasons), and the pa
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 0xd6c9b26a5f243f90f85cfbcb5fcd53f4fde69c9ade9362b9855409edb9efa2fe. 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/595f49a6-e00b-48ce-a107-45bc099b9caf.json and https://artists.proofprofile.net/proofs/artist/595f49a6-e00b-48ce-a107-45bc099b9caf.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 0x30fcb3bfc86f7d75c4ec800e7d41809ad47566f88b25d9b57d5b2a883704f2e8. 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/FR2X42208265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6647373371fdbe5059492a73ceff35ddf8cf63b9e0c34bf0c67f2d62053021a. 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/FR2X42208267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7038ad1cb703c9d3ef3e66abdf3a26b89c1c77d769eea125405fdf9ba33151. 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/FR2X42235637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7765153c4af5f5bf20b83d0bf3954ceaecdbdef011d77482df75ff2817071ffb. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR2X42235641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259a7eed2d8af7979cef16b88ef517f88755269d66982ebd6ae598932f0e280. 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/FR2X42208802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0101998b5f07c3130d47960af1306d860d94c781db24acb0499b97002d529d67. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/UALA11500453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821249559dcd71d75e7118e3dc6a367a238b354e5649b9e8848515f501ac4c74. 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/UABM11801644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1945bcbbf22b9758b8b4456ccfb383a9e25f0cc45095192a5ef9090859d4335d. 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/UABM11801640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76827af77e4eac8ca203a53748128e65d6255f2d3afbdb9a59e3ed86b0ad02e7. 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/UABM12000459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8308e6c39ab7a8d0f1df80bb7520a7e52eae87e6c3b4daef321886ddb4e0da. 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/UABM12100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc848fb7e4d45e07841736059a23e52e148fd2539e22ca4c72b50cfed87fc2b05. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QMBZ92246869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa879460f2b29adc730513ee1319ab39c281b7d7bf9526e50c807c48408120b2c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMBZ92255894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396806f6dfb3d38761c2bef1f67c383bd63d2029c44e5197ce31af72f66fd3ac. 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/QMDA62241012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cae5039c8e8244bcab82b2933e725aa7e8735534d7b21f1ef0d50ded357d95f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMDA72230320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bf38beb96af7f56c01d58d26b574fd513257b136ee4d9bba67ec4f2f50f148. 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/FR10S2272668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342b0c7d578f8f0bb32ce8370d02acf3d811931d61c009b814c8bfb96c69dbfe. 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/FR2X42227265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b12acc4f0faf416173bc040843223fb93556d0faabc917dd3e39d4d252bd49. 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/QM4TX2333969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f2fb2056e3745df6823478b0aa81e511616e7966d6e4befac2db17bc17dac8. 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/QMBZ92367267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebefd95c5e642ecfa805b47994416aa13f87d267a9f4ec49fcb5a059080bbe7. 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/QM4TW2449468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c5f503bd2faf8f06127b5422f11b9ad48e0619d5aa0604ace4a93695941344. 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/QM4TX2593657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428524e08a0404871e836e7485c0808bbed4f72b8eb1a86df844f85ee3b4478b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QM4TX2593733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ff565184660ff973abc16d3c9847c155afb209809f8861cb6801facb723ced. 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/QM4TX2593738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a831e460700be65dd3d37a8f80e189e8ffdf0886d193d17b60764d37369907. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DGA092380452.