Sylvie Varcoe
type: MusicGroup
popularity: 2
followers: 30
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc023023909dae811ccbd2c601a46c737d2c20b51e4b868059c1cd6fe7f278c65
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953867
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953867
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/066a0fcb-b14f-4ac2-888c-262d95809648.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/066a0fcb-b14f-4ac2-888c-262d95809648.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/066a0fcb-b14f-4ac2-888c-262d95809648
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:09:47Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc023023909dae811ccbd2c601a46c737d2c20b51e4b868059c1cd6fe7f278c65","name":"Sylvie Varcoe","registered_at":"2026-06-15T15:45:18Z","symbol":"NIM0755339","token_address":"0x1f279c08dd7060466b100f2bbbce9339b6966fca","type":"artist","uuid":"066a0fcb-b14f-4ac2-888c-262d95809648"}
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 0xc023023909dae811ccbd2c601a46c737d2c20b51e4b868059c1cd6fe7f278c65. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/066a0fcb-b14f-4ac2-888c-262d95809648.json and https://artists.proofprofile.net/proofs/artist/066a0fcb-b14f-4ac2-888c-262d95809648.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T01:09:47Z
  text: {"copyright_id":"0xc023023909dae811ccbd2c601a46c737d2c20b51e4b868059c1cd6fe7f278c65","name":"Sylvie Varcoe","registered_at":"2026-06-15T15:45:18Z","symbol":"NIM0755339","token_address":"0x1f279c08dd7060466b100f2bbbce9339b6966fca","type":"artist","uuid":"066a0fcb-b14f-4ac2-888c-262d95809648"}