Martha Lipton
type: MusicGroup
description: Martha Lipton (April 6, 1913 – November 28, 2006) was an American operatic mezzo-soprano and music educator who is best known for her career performing at the Metropolitan Opera ("The Met") from 1944
popularity: 11
followers: 232
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd800eb07760bd37830593b16cb93d8c4f4bedf25228bb93d9798816f400c3304
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953807
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953807
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efee9d21-1634-42f0-847a-bf61ab322a75.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/efee9d21-1634-42f0-847a-bf61ab322a75.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/efee9d21-1634-42f0-847a-bf61ab322a75
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T16:39:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd800eb07760bd37830593b16cb93d8c4f4bedf25228bb93d9798816f400c3304","name":"Martha Lipton","registered_at":"2026-06-15T05:44:10Z","symbol":"NIM0700179","token_address":"0x5e730330b4976fe3a260bbe245fa1d49b4d4ca89","type":"artist","uuid":"efee9d21-1634-42f0-847a-bf61ab322a75"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd800eb07760bd37830593b16cb93d8c4f4bedf25228bb93d9798816f400c3304. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/efee9d21-1634-42f0-847a-bf61ab322a75.json and https://artists.proofprofile.net/proofs/artist/efee9d21-1634-42f0-847a-bf61ab322a75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T16:39:18Z
  text: {"copyright_id":"0xd800eb07760bd37830593b16cb93d8c4f4bedf25228bb93d9798816f400c3304","name":"Martha Lipton","registered_at":"2026-06-15T05:44:10Z","symbol":"NIM0700179","token_address":"0x5e730330b4976fe3a260bbe245fa1d49b4d4ca89","type":"artist","uuid":"efee9d21-1634-42f0-847a-bf61ab322a75"}
album: Mussorgsky: Boris Godunov (Sung in English) [Live Recording 1956]
  type: MusicAlbum
  date published: 2014-07-01