Igor Vladimirovich Talkov (; 4 November 1956 – 6 October 1991), was a Russian rock singer-songwriter and film actor. His breakthrough came in 1987 with the David Tukhmanov-composed song Clean Ponds wh
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 0xcf06de99a8b44b644f9e5cabdc60948f31617f56de1c5963374ac32634709826. 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/bf167443-f4b1-481f-87a9-acba1bf75f8d.json and https://artists.proofprofile.net/proofs/artist/bf167443-f4b1-481f-87a9-acba1bf75f8d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Концерт 23 февраля 1991 года в Лужниках (Live)
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 0xd8ff2f7f67411e980b02c9d8b5fdb02b5a98d2b6efbf89ba1cc06c6ac8eec798. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/RUB731523047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40ad216ef26cc1f826ae846e4969ccca99d2befe539b6b94748e52bd2c3793f. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/RUB731523139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf696e80badf764a90d8534d5e4315801b660867fe095c334e8cea901aebc8a97. 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/RUB731523035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9510f3c06a2108028e0efa2b34d5c6118aea868609bbf8d6948955d2ae33b6. 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/RUB731523031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9afb6b2cca7fb9c2bdcfa6f8a4c4444a388b866379f858673beac411077669. 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/RUB731523145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e34e4ff6b6e6d857f70f3078594f5f69cfbbce0174af701895b2a1ca29e7468. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUB731523037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686d78b428d50f559be944f40db8f406fbe7240a1bcd431a8c3d64979cfc8ffe. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUB731523205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51fadd751e9374ff49bcc06a69ca91d3b54f608fb6069124a74298e4d294418. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/RUB731523143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7419d5e8f5383e1f91d84bf2343e44b29f469bbabc252014d9d1cf70e60b5baf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/RUB731523039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322c4dfb0271064aa212372992a71f02d901648096453e11e2b7162cfc83d9e5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RUB731523292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d89ba4cd2dca82709bad030d77ea40c3150224868fffee6c159275323ccc25e. 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/RUB731523159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fde3223e010d743de066263bde66a59d84a904f98e25588e2d949da67c3f4a2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUB731523111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1591ec360fe405e04d93477d5c22c8b01681eae9d94d882e7d91ad5d4d298748. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/RUB731523129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698bceae88e30293415c73d28cad01307cd6f422ea6c2bae6abeefc6bba35a47. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/RUB731523155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822bcb31ee35cde1db962d8c5643d9b810d3eb5a6d13d1d0ca3df9ee2e5bee49. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/RUB731523007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84e22b45644f34c1f142dffb7fb5f878c4389b5544d9551780e2fc4742bf139. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/RUB731523117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c92b49ae083c8464558cc892dbd2c0a068d169d590c838e1a474b285b155394. 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/RUB731523151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8754cdbf5c78a73169abbbd99f5bb9eb0c2c38acf9b9f5ba75b3dce2687d94. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RUB731523165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb576bf37062a701ef344a81a8cabc0d76ac9bc7d277c65958b1787e0dc8567b. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/RUB731523003.