thumb|right|Liza Lehmann, c. 1889 Elisabetha Nina Mary Frederica Lehmann (11 July 1862 – 19 September 1918) was an English soprano and composer, known for her vocal compositions.Banfield, Stephen. "'L
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 0x468d3ce8a144719ab4e8e7d646c2cf914ca773411f30de4bdba066690b60f17c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90da55a5-57f2-49ae-8337-d028a447caed.json and https://artists.proofprofile.net/proofs/artist/90da55a5-57f2-49ae-8337-d028a447caed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lehmann: The Daisy Chain / Bird Songs / Four Cautionary Tales (English Song, Vol. 8)
Lehmann: Daisy Chain (The) / Bird Songs / Four Cautionary Tales (English Song, Vol. 8)
Liza Lehmann: Breton Folk-Songs: No. 2, I dreamt my love was singing
Liza Lehmann: In a Persian Garden: Ah! Moon of my Delight (Transc. for Violin and Piano by Liza Lehmann)