Vladimir Okonovich Karuev, (born 2 April 1957), better known by his Kalmyk name Okna Tsahan Zam,, , , is a Kalmyk folk singer, known for his throat singing and as a performer of the Kalmyk national
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 0xd6f57d6d53859456a14f719abdad062617c9ec7f25abd98df8b0a7a39f353e67. 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/9f9f808b-9ed6-437f-96f8-6828d855aca1.json and https://artists.proofprofile.net/proofs/artist/9f9f808b-9ed6-437f-96f8-6828d855aca1.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 0x3309416bf94b0e7d6839dbd71eb0158bd6e750f68a9008aff17f5c5347075f01. 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/FR6V80403351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d7dd36bdb9c66e48dc93b0717efded4e1eaf7b29e9da1b70278e228ecac888. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR6V80403352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71abba8af72c83815a78edc6a4389ed1db99b1df271f60dab410019adb80324b. 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/FR6V80403353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c64c756c82c0363989c2b9a9eafdef2d46e05388c9f1d0795596dc781ce0d8. 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/FR6V80403354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9de67159e28dd56760c57d45c12474a6f70f8e59cdb79acf8fcf025065dd3a. 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/FR6V80403355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd92c3660fa036adf6e08b33cfd3086706173fad9c1c8a7d0b7b69c5587150b. 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/FR6V80403356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc316ea7c28a79575fa7172f7029e0e3b4bfba729a1f3841f3e86fb888e738465. 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/FR6V80403357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2578bfd479690140051f5af312c04891590db3097a198ed6b43375f0ee8ca3. 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/FR6V80403358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42809ec3dc2d904057acfe1e666d3e2370f614b15ce41e496ca36648d5f18163. 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/FR6V80403359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325dc48dc639f12cd6a14f37b590653bd18d524d00b9c8a59552f6199b87f0d2. 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/FR6V80403360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf9356d500009786329270b9e2c8c647c4dc1aa1f151ce9d5f9f053431ef93. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/FR6V80403361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915bae82974c88080e158cd2d8f9f04aa189d755bf0aacf5f1e8c8b0fa7e81a6. 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/FR6V80403362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3a3fe9ca5c348bb2a9756cca7d38b343119678c1df57189d5019fb9b3a36aa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR6V80403363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09069c80eccb024941cffe9aeadf048d4e6c6375805f9506eb4e9ecdddbf9c57. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR6V80403364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf68e847dab42043c1a80779ecac404c1bc338b630ee4f057188002da1f03a94. 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/FR6V80403365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd4d50f45c344c0311e456ad4e9f387e3e558ea0b5386845a80e27b512d7e0a. 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/FR6V80403366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763e18300cc0e2bb1bfaeb15ab4f6b6e61292ea111cd183fb044da2c3ce3732e. 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/FR6V80403367.