thumb|Ursuleac as Fiordiligi, Così fan tutte, Salzburg 1932 Viorica Ursuleac (26 March 1894 – 22 October 1985) was a Romanian operatic dramatic soprano. Life and career Ursuleac was born the daughte
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 0xbc4ea403bcd9af7b9587f6a09a03e9e27a8347fefa5b0b29362944fdf855828f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fa1147b-4f8e-4a20-8784-37f3913dbd56.json and https://artists.proofprofile.net/proofs/artist/6fa1147b-4f8e-4a20-8784-37f3913dbd56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Richard Strauss: Historical Recordings, Volume 4