Ruben Feffer
type: MusicGroup
popularity: 3
followers: 112
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4cdedad112d73d111cab5ac4353db88b5a15fe410c35b4ee20b124a2cb3336b7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954038
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954038
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3dd9d3e5-702c-4c36-82c6-3a75fd7cb52b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3dd9d3e5-702c-4c36-82c6-3a75fd7cb52b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3dd9d3e5-702c-4c36-82c6-3a75fd7cb52b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:57:22Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4cdedad112d73d111cab5ac4353db88b5a15fe410c35b4ee20b124a2cb3336b7","name":"Ruben Feffer","registered_at":"2026-06-16T11:11:03Z","symbol":"NIM1033608","token_address":"0x3a247bccfbb792c3ae0698028681d4cf6c8b3c2e","type":"artist","uuid":"3dd9d3e5-702c-4c36-82c6-3a75fd7cb52b"}
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 0x4cdedad112d73d111cab5ac4353db88b5a15fe410c35b4ee20b124a2cb3336b7. Chain 2 (Bitcoin): anchored in block 954038 (2026-06-17T02:57:22Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dd9d3e5-702c-4c36-82c6-3a75fd7cb52b.json and https://artists.proofprofile.net/proofs/artist/3dd9d3e5-702c-4c36-82c6-3a75fd7cb52b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T02:57:22Z
  text: {"copyright_id":"0x4cdedad112d73d111cab5ac4353db88b5a15fe410c35b4ee20b124a2cb3336b7","name":"Ruben Feffer","registered_at":"2026-06-16T11:11:03Z","symbol":"NIM1033608","token_address":"0x3a247bccfbb792c3ae0698028681d4cf6c8b3c2e","type":"artist","uuid":"3dd9d3e5-702c-4c36-82c6-3a75fd7cb52b"}
album: Tito And The Birds: Original Motion Picture Soundtrack
  type: MusicAlbum
  date published: 2020-07-03
album: You Are Not a Soldier
  type: MusicAlbum
  date published: 2021-08-11
album: Astronauta
  type: MusicAlbum
  date published: 2024-10-16