Stuttgarter Hymnus-Chorknaben
type: MusicGroup
description: thumb|upright=1.3|The choir in 2007 The Stuttgarter Hymnus-Chorknaben (Stuttgart hymn choir boys) is a German boys' choir founded in Stuttgart in 1900 by the Swabian entrepreneur in 1900. History
popularity: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7f2767b1d95edd821e97bbf4f612e67150d01870f561aaa6f1ff01a28ba45da1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953968
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953968
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/29d5cb76-f66b-4456-ba12-e12d7162851d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/29d5cb76-f66b-4456-ba12-e12d7162851d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/29d5cb76-f66b-4456-ba12-e12d7162851d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:01:49Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7f2767b1d95edd821e97bbf4f612e67150d01870f561aaa6f1ff01a28ba45da1","name":"Stuttgarter Hymnus-Chorknaben","registered_at":"2026-06-16T04:02:19Z","symbol":"NIM0931239","token_address":"0x3afef43435cee9b0cc60ee3fef839ec163f1b8ff","type":"artist","uuid":"29d5cb76-f66b-4456-ba12-e12d7162851d"}
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 0x7f2767b1d95edd821e97bbf4f612e67150d01870f561aaa6f1ff01a28ba45da1. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29d5cb76-f66b-4456-ba12-e12d7162851d.json and https://artists.proofprofile.net/proofs/artist/29d5cb76-f66b-4456-ba12-e12d7162851d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:01:49Z
  text: {"copyright_id":"0x7f2767b1d95edd821e97bbf4f612e67150d01870f561aaa6f1ff01a28ba45da1","name":"Stuttgarter Hymnus-Chorknaben","registered_at":"2026-06-16T04:02:19Z","symbol":"NIM0931239","token_address":"0x3afef43435cee9b0cc60ee3fef839ec163f1b8ff","type":"artist","uuid":"29d5cb76-f66b-4456-ba12-e12d7162851d"}