The Sirin Choir, Choirmaster: Andrey Kotov
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca34ae0de06020e177db21863dc7b70384ce432d940324e4b070a3c085513d5b. 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/701689ab-5353-4829-91ae-377740ec7259.json and https://artists.proofprofile.net/proofs/artist/701689ab-5353-4829-91ae-377740ec7259.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Glorification Of The Navity Of The Blessed Virgin
Praise Ye The Lord In The Highest Heavens
Chant About The Separation Of The Soul From The Body
Song On The Separation Of The Soul From The Body