Nadezhda Nikitichna Kadysheva (, ; born 1 June 1959) is a Russian folk-pop singer of Erzyan heritage, she is the soloist of the band Zolotoe Koltso.Сайт театра "Золотое кольцо" Retrieved 26 January 20
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 0x8145ab994071581761fdddb93144d14edf54c0988c0b544d4d90906663563346. 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/4bff6fc7-21d0-4820-ad9c-2fd51696b396.json and https://artists.proofprofile.net/proofs/artist/4bff6fc7-21d0-4820-ad9c-2fd51696b396.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 0x7f8ddadcdf4c18cbc5793316cb38508b6acc969c40f777ab946b3399f31cc179. 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/RUB731403284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af247a66e571856018ff6739edd6d530c6e92d064bd91b66ed95414af67df0a. 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/RUB731403317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192cdaffa81a2c90d2d1b26efca53b8388606af6006848da30bcc0d57f6e7825. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR6V81601365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ac873658fdc6c6fbf76a85c6e138663434c0e2ee3111cc2e3ccf4e1c6912c8. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR6V81601366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb50f442e2f57a7bf03b916a25c1073465bb161de2b76d5bf1a54ecb3ef2201b. 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/FR6V81601359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1872d86855ea6bb28e07737ac52756306761c9786f7dde23f7b722a400a526a. 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/FR6V81601360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c09058adf195c6e812f043e4132732c6bb771250e17bb39a27d9d901c030b31. 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/FR6V81601369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d73875cad753fdf2a90a9ce011940baa7b27f0522c9ee4bc5d4aac36f17507f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/RUB731301274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6589566834e2aaa7c16db79abbd3a34bd8d8337079c08095ba7c02a1eab904. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUB731301596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e02653d9e7edf29ace7eb9f23fc35b992bbc301ccd95942e19aff5146ab807. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUB731301607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928f96eed17a5aa5460a7ed4f46473768be873bc40b39fa21088094c9cd1efa3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/RUB731301685.
Подмосковные вечера (feat. Toto Cutugno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d093635914e2a19e0fc2cdb84a85ae9dd7717790a0abac35d5e8541d012dc4. 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/RUB731406451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f3d036d8f950bafe8625f120cc66ed24da0ca4069658f7c9e7578e094706b9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUB731555140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bdeb2f3616ea75b9d5d36130ecb6abf76faaf2437411fdfea2ce405a6b658a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/RUB731555147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5633be9c3ded79c7ad450b38a810ebc2899eaad09c27f2ee48dc02fa6920f3c8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/RUB731555145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2aac0e8cd12781ebbbe14bae0915c68b7259946c25506d88ba98c8afcf98d7. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/RUB731555347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8340b6afd840fdbcf0576ccb4f4040586ada64e0a0e7934c88342a905d235e22. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/RUB731555155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a39d32123da3495462ee1b42806fe21188bcf8f6cdb26fcf6c9d56034222fc2. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/RUA322205335.