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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766b8c96dbb3d80fb0a1a687774fb70faf6dac37baca91b0a48409e772a5a771. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbba82975812bf06f1959426b515b3035a4a97b1b36560358b04af350845cc5. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:31:23Z), 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 958211 (2026-07-16T00:49:01Z), 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 (2026-07-21T13:33:23Z), 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 958544 (2026-07-18T12:14:37Z), 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/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 957810 (2026-07-13T05:55:46Z), 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/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 956639 (2026-07-04T11:19:20Z), 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/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 958788 (2026-07-20T00:25:28Z), 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/QMPU51206371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e87ec10997f7dc7c1cab22473db6e569e3f7f43e86ed30d8f2d2cc9bdbb6ef. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:40Z), 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 956476 (2026-07-03T09:04:44Z), 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/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.