Bakhtin (Russian: Бахтин) is a Russian masculine surname originating from the obsolete verb bakhtet (бахтеть), meaning to swagger; its feminine counterpart is Bakhtina. The surname may refer to the fo
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 0x215f515213ba2f9e3bc5a823f18b6a1a883cc0fe9d580c241ae604fd20c1b764. 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/d638d0df-31b0-423b-b1aa-be59e0cbb5a3.json and https://artists.proofprofile.net/proofs/artist/d638d0df-31b0-423b-b1aa-be59e0cbb5a3.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 0x8530f1791fd26353d018e5831f109bd2ec32b767fab213703f3320c5a9bfe476. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/FRY602007088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe416b6985663e830d8d4264d80ea13238edb8672dc47f0247865bcd1e585e547. 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/FR59R2078764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b1a4acd4f9a976a552b13620b419f9906689457774cd46a2e16ee15fbe9eda. 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/RUA1D2029437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833f16f2ef923c0888bfcacaf143edf03e1fa209205c23b37f44659441abd61a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/RUA1D2125070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee81ac460d7c3347bbf3996c53264ab108964145aa55bf6c33d6b208cabb820. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAFQ2181410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173041b58ce9388d37f36587ca1256cefa6f3e6b409c8838e0ccfc45d36d5dfe. 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/TCAFS2178613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fded2653bd3a85fef78e2e04ba663722940f12cb92f9bead8a3b829c6d65ef. 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/TCAFS2178614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c645fe0e9ec8b137a8f8898d65891a0c184387f269b4f1b3ea0d1e45480673. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAFS2178627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a21a0d3936404a186fddddeca5e579d9b8e66af475e009ffe119897f7d31b1d. 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/TCAFS2178631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d11feed109a75b42ee3585d74a0d3cd6ca2d228b43124d96c67afa57b3cb6ea. 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/TCAFS2178664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423b7fe57b0a210540e0630d8d6ea17dda0cc702e69b4035ad1d37fad9c6d20a. 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/TCAFS2178671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8a3e0c3b3c162fd185f9f2f5cd0d99ec6052995f10c4df87dd5c9cfd3f93cb. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/TCAFZ2241662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8d61f9aacd447ea37f0f9f3cd6ae888f0b603d19f0744bc22ca69293310aa6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SMRUS0073402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aaaebff936428229e9fb02768b434e234841358ef24a21410d3b67d0a2c55fd. 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/SMRUS0074281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b6f7e0ef61c455f86c1fd69451d39f8550f413e319640222de9144ca56462d. 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/SMRUS0075081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a57b8265ab8fbdd307e733c67e3f16bb2cdba89a332fa3333c0db0bf1862004. 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/SMRUS0076325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056e30727e89bedbd1f61191f2fedd7b50be9119875ea368466307bebdbc955f. 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/SMRUS0077212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63329ad52e946ede577864fcf769b62dd3198a2663b3c0e89fc653004b868679. 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/SMRUS0078264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0092c430ddb0016ca628ad2dc2e73fbfcdfbe54081002fc153c50be3d72fae. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/SMRUS0078496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cae35d212ae1a130f202801b862396f8f8eb5036febb13a853edb4d21cc52a. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/RUAH62407111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf189f8b667a49b15e094deeaaecc710e4f93ce2e26a210f841ee68772c3011b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/RUA1D2542628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ced0221ea4453431e79d9ec165121780c0687705dfffc276f5a6b650c61e851. 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/RUA1D2591725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff54a41a258d5538184825ea1f54f9a21d30993d5c2555a7fd99dacfd27a251. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/RUAGT2531541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4c142231ad73e90e081b800d59cafd780a17615b1031ab0d46fe37e9c1bc0a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUAH62512823.