Nepara ("Not a pair", Russian: Непара) is a Russian pop music duo formed in 2002, composed of Aleksandr Shoua () and Victoria Talyshinskaya (). The duet was produced by Oleg Nekrasov. Background In 2
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 0x766b8c96dbb3d80fb0a1a687774fb70faf6dac37baca91b0a48409e772a5a771. 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/e7c6bd9b-f26a-4d13-b674-73e500e0cd58.json and https://artists.proofprofile.net/proofs/artist/e7c6bd9b-f26a-4d13-b674-73e500e0cd58.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 0x4fbba82975812bf06f1959426b515b3035a4a97b1b36560358b04af350845cc5. 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/QMPU51737456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab56828105b5c829807568df2ee92216b6b004ae8c21a2c8f490f4e8b6220f8a. 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/QMPU51737450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f27a8c21be5c7ee77222ef041070264a5cef75036087466ec7090d06284315f. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QMPU51737451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ff60f0fa085a3f56481892ab558b07da5ee188fd50145ea4f5adf4f847c280. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMPU51206354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cffa0080aa6009148a8bb23ccc2cae547dcb6d5bf448e01153fd2c11464ee2. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QMPU51206356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64220b43d5a3c29d6a8fdb53fe3ac2cfba49e91856e0e4d6f57cd5d436cceedb. 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/QMPU51206358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f107aeff2cacec3222296246d1155b3d86c53119e8ab6c3ac75d862d89754d0. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMPU51206360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b96e5ee65681101eb1e6267774ad0ff587e44d78753dfe57a0605ebb7fe330. 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/QMPU51206361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea89e0c75717e095dd369fb0487d48d35e589b765cb53ddd4d2d1945fbd8149d. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QMPU51206363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb84cf95011079a27f0b199272acf1f50576ee2e54307b954c02152d1dce73e6. 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/QMPU51206365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c4bb6d85bc901dc7b6c31a63d4e467c90c10e7003521eef1bf6605c4284c37. 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/QMPU51206367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa356fbff30dbab39a0225f84df2fc71c7c40ea97f6c9b82fbf8472a2e6c0e885. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QMPU51206370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd15f7b7c51849742fc94ef8820c31e677fb43ccfdbc0917261602fc2c0be184. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QMPU51206371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e87ec10997f7dc7c1cab22473db6e569e3f7f43e86ed30d8f2d2cc9bdbb6ef. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QMPU51206375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfae73a13b1ebc0eb232e4924b9cdc5e71521a98f4173ff2651d5704dc3d932. 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/RUB731406068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b10dd6292d178b185c47e47749eb64b7a51c9a5382a45509db0a795ed2bafd6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMPU51519175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c83ae74f8620c4a26d3c3889e21bcc23f8e5655b8b3c5dfeae8ae8b1f65af5. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QMPU51634451.