Ruth Siewert
type: MusicGroup
genre: opera
description: Ruth Siewert (also Rut, Sievert-Schnaudt, Sievert; 1915 – July 2002) was a German contralto and voice teacher. She performed roles by Richard Wagner at major opera houses in Europe and at the Bayreuth
popularity: 4
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9cc5bc069753e6297c884bcc07eeb4a07911f53443659e3cad1855792d8b8e1f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953896
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953896
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1121e61c-0f8c-4599-bee3-487f473997c2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1121e61c-0f8c-4599-bee3-487f473997c2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1121e61c-0f8c-4599-bee3-487f473997c2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:05:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9cc5bc069753e6297c884bcc07eeb4a07911f53443659e3cad1855792d8b8e1f","name":"Ruth Siewert","registered_at":"2026-06-15T19:30:15Z","symbol":"NIM0809028","token_address":"0xba4af773b22a2a735eb33b425c6bee71543e3654","type":"artist","uuid":"1121e61c-0f8c-4599-bee3-487f473997c2"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc5bc069753e6297c884bcc07eeb4a07911f53443659e3cad1855792d8b8e1f. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1121e61c-0f8c-4599-bee3-487f473997c2.json and https://artists.proofprofile.net/proofs/artist/1121e61c-0f8c-4599-bee3-487f473997c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T06:05:56Z
  text: {"copyright_id":"0x9cc5bc069753e6297c884bcc07eeb4a07911f53443659e3cad1855792d8b8e1f","name":"Ruth Siewert","registered_at":"2026-06-15T19:30:15Z","symbol":"NIM0809028","token_address":"0xba4af773b22a2a735eb33b425c6bee71543e3654","type":"artist","uuid":"1121e61c-0f8c-4599-bee3-487f473997c2"}
album: Carl Schuricht - The Collection
  type: MusicAlbum
  date published: 2020-09-11