Greger Siljebo & Jakob Petrén
type: MusicGroup
genre: folk
genre: swedish ballads
popularity: 2
followers: 147
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x536913b4c9912df85253cbcd017455acaae124a56a97e6e57fd378ac9bcaa7b3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954013
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954013
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3437d8d7-227e-4b18-a241-e5d8474a7afd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3437d8d7-227e-4b18-a241-e5d8474a7afd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3437d8d7-227e-4b18-a241-e5d8474a7afd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T22:27:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x536913b4c9912df85253cbcd017455acaae124a56a97e6e57fd378ac9bcaa7b3","name":"Greger Siljebo & Jakob Petrén","registered_at":"2026-06-16T08:05:24Z","symbol":"NIM0989314","token_address":"0xba2ef16e10cdc7e4ea979ebecfd7d62184fe7bf2","type":"artist","uuid":"3437d8d7-227e-4b18-a241-e5d8474a7afd"}
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 0x536913b4c9912df85253cbcd017455acaae124a56a97e6e57fd378ac9bcaa7b3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3437d8d7-227e-4b18-a241-e5d8474a7afd.json and https://artists.proofprofile.net/proofs/artist/3437d8d7-227e-4b18-a241-e5d8474a7afd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x536913b4c9912df85253cbcd017455acaae124a56a97e6e57fd378ac9bcaa7b3","name":"Greger Siljebo & Jakob Petrén","registered_at":"2026-06-16T08:05:24Z","symbol":"NIM0989314","token_address":"0xba2ef16e10cdc7e4ea979ebecfd7d62184fe7bf2","type":"artist","uuid":"3437d8d7-227e-4b18-a241-e5d8474a7afd"}
album: Vandringen
  type: MusicAlbum
  date published: 2012-05-28