thumb|Konstantin Nikolsky in 2007 Konstantin Nikolaevich Nikolsky (; born 1 February 1951 in Moscow) is a Russian rock musician, singer, guitarist and songwriter. He has played with many Russian bands
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 0x27d49549d48d8215f1c2c98bb2b62c42db42fe981822c601a90515531c1591f6. 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/f9bd4be3-60dd-47ed-9624-6ea56826f80d.json and https://artists.proofprofile.net/proofs/artist/f9bd4be3-60dd-47ed-9624-6ea56826f80d.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 0x786116c727992df75dc5a350ce0a66e687900e11cf2dfcb5393a96e3e29b07f6. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/RUA0G1800332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73027fc2d68486c9b1999f6e0b772f26608b7768c48724ace17f8dbe7503f1c8. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/RUA0G1800333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc83d2b4b322ef8df4c895667a01a7c3276c8adf8ec03ee49b58995458f5e3b. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:38:57Z), 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/RUA0G1800334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450b0cf23507a1f119eb78cc8a30380aa3a8116192f942c88993fad59584cf9d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/RUA0G1800342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05504d7a51f5e8a223b04873c6cd9eacd459fbe6f3bd3c3eb66e5e1a35cd9937. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/RUA0G1800343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad8a84695f998675dcc8ea5c5c8dd4b7a529ba2ee5f55041a2dea57ed2f369b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:28:12Z), 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/RUA0G1800344.