Margaret Harshaw
type: MusicGroup
genre: opera
description: Margaret Harshaw (May 12, 1909 – November 7, 1997) was an American opera singer and voice teacher who sang for 22 consecutive seasons at the Metropolitan Opera from November 1942 to March 1964. She be
popularity: 2
followers: 55
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba377cd4620847fe982d030c085c28bc8ad82e59fc750944c161197c15f7554. 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/75c33fa3-54b3-48d7-a491-330e6504a90d.json and https://artists.proofprofile.net/proofs/artist/75c33fa3-54b3-48d7-a491-330e6504a90d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
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