Камерный хор Ленинградского государственного института культуры имени Н. К. Крупской
{"copyright_id":"0x6b19a9dfafabb400bd93c95e1c28636bb3e89f2bd2f4b93d3a95d5aae4e5ce6a","name":"Камерный хор Ленинградского государственного института культуры имени Н. К. Крупской","registered_at":"2026-06-20T21:38:54Z","symbol":"NIM1720844","token_address":"0x4195813806c4059cb8c338763d65cbd51e85c24b","type":"artist","uuid":"c7274f7e-ae38-4fff-9a7e-d083a14ed0e0"}
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 0x6b19a9dfafabb400bd93c95e1c28636bb3e89f2bd2f4b93d3a95d5aae4e5ce6a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7274f7e-ae38-4fff-9a7e-d083a14ed0e0.json and https://artists.proofprofile.net/proofs/artist/c7274f7e-ae38-4fff-9a7e-d083a14ed0e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).