thumb|right|Groop in 1990 Gerd Monica Groop née Riska (born 14 April 1958 in Helsinki) is a Finnish operatic mezzo-soprano. After graduating from the Sibelius Academy, she joined the Finnish National
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 0x68d670d797d07be4dd442095bff0abbfc05d2e1dba3a3a2b0d4ed71c95e47380. 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/4fb0c66e-c544-4a19-a5e1-f0c173c248e2.json and https://artists.proofprofile.net/proofs/artist/4fb0c66e-c544-4a19-a5e1-f0c173c248e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vocal Recital: Groop, Monica - Christmas Carols and Arias (Loista Joulun Tahtonen!)
Don Giovanni, K. 527, Act I: No. 7, Duet. Là ci darem la mano - Live at Royal Festival Hall, London, 1996
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 0x35d0a4dc8acf559d6a437eecb7d1cdf9151e12414522de32f5fc8694fce65b33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF079643413.