Anna Onanova or Anna Purtsen, better known as Anikv (Аника), is a Russian multi-genre music singer and songwriter who is signed to the record label Gazgolder. Biography and music career On 3 March
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 0x2904ea4f3d797ef2aaf2ab21bd118d98be274f141e94843e837115161ce21d91. 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/0000792d-bc92-4cf8-a703-b780eae0e6bc.json and https://artists.proofprofile.net/proofs/artist/0000792d-bc92-4cf8-a703-b780eae0e6bc.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 0x365037dce3315960e8b1eb2b0910adcc0a8ac9f6c435459a7faff1bf6583918e. 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/TCAEC1966163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84ea6f4bab45eb945cbfc8bb588fc6aa5d5ca28c03dfc521d1715546561dfb9. 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/FR96X1993556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8601f6e077a2eb36c47c67e18419a4de00ab5deffad34a0454fb62ee69ffb97. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/FRX201950452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb164025926152810d32d176f0dc965f8d4e6ef70b1327444e570695858aca529. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR10S2014566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a85a6edbd64bf94fbe1091589a0eed69c227cf9e0bb946fbd985caa71ce0472. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/FR2X42060166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81af0810b471c76ea88c27b13d9f225ec9db8a8abcdfe7c91487d1b928393c2e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR2X42060169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3b816ccc9ad83e3f7d3b28927ef6b8381be096250ae49fe1e57cc0e6d70e51. 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/FRX202043953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd551e8b17bbefb46c50c49e2fb53aef234597a6ba9c84d21f13cdec988e5dbb. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/FR26V2098396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2906a8ee895e760c534a452c821ece053c107cb43322d88c5febed56489648. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DGA052009704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6920b7fe52fea54ac78aec1b41ea79367619e58ee30eaa1d5d729fb551f012. 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/DGA052009707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9b74f4c0e5ab9158e4358c353f62267afa9ce9b3c159c97dcc36cb1378e8ba. 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/FR96X2345979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe86077cc3f3cf558cd87f1e4d6433914604997ee7549d3ed9c7b71911ae3f9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA072366002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e5cab1956c5353f55e999b86d52eb23df498936d0c5f0ab183ff4b8d0e276c. 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/DGA0Q2317507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cfbce67d850a34889e521f61946d30a72db8f84f271b13285129e42a0afb64. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2368360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cc276c06880a8a683e0041965a7d8b7e6eedcd4f2c91e158e11d2bfd057587. 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/FR26V2032146.