The St. Petersburg Chamber Choir
type: MusicGroup
genre: choral
genre: gregorian chant
popularity: 12
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4e87215ef7f0232e32550910fa3e88547587d377358a0b80bb458a0acfe9ffa5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953638
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953638
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/391663a9-d3c7-413e-b835-3a370f4caa8a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/391663a9-d3c7-413e-b835-3a370f4caa8a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/391663a9-d3c7-413e-b835-3a370f4caa8a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T13:10:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4e87215ef7f0232e32550910fa3e88547587d377358a0b80bb458a0acfe9ffa5","name":"The St. Petersburg Chamber Choir","registered_at":"2026-06-14T10:25:57Z","symbol":"NIM0423792","token_address":"0xf1854a6be7dd65a364b70fdcfbb2628b7bec1dcc","type":"artist","uuid":"391663a9-d3c7-413e-b835-3a370f4caa8a"}
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 0x4e87215ef7f0232e32550910fa3e88547587d377358a0b80bb458a0acfe9ffa5. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/391663a9-d3c7-413e-b835-3a370f4caa8a.json and https://artists.proofprofile.net/proofs/artist/391663a9-d3c7-413e-b835-3a370f4caa8a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T13:10:39Z
  text: {"copyright_id":"0x4e87215ef7f0232e32550910fa3e88547587d377358a0b80bb458a0acfe9ffa5","name":"The St. Petersburg Chamber Choir","registered_at":"2026-06-14T10:25:57Z","symbol":"NIM0423792","token_address":"0xf1854a6be7dd65a364b70fdcfbb2628b7bec1dcc","type":"artist","uuid":"391663a9-d3c7-413e-b835-3a370f4caa8a"}