SIGMA.PI.CREW
type: MusicGroup
popularity: 2
followers: 436
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa444870a3aa2afd562ee81b43d9ea8503f3a92452450e43fe7cd5e8cfcbaacf9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954043
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3ee15d62-f932-43de-b752-0d0fceaaf7d4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3ee15d62-f932-43de-b752-0d0fceaaf7d4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3ee15d62-f932-43de-b752-0d0fceaaf7d4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
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 0xa444870a3aa2afd562ee81b43d9ea8503f3a92452450e43fe7cd5e8cfcbaacf9. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ee15d62-f932-43de-b752-0d0fceaaf7d4.json and https://artists.proofprofile.net/proofs/artist/3ee15d62-f932-43de-b752-0d0fceaaf7d4.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T04:15:20Z
album: KAKOS EAFTOS
  type: MusicAlbum
  date published: 2020-04-03
album: ΚΑΘΑΡΣΗ
  type: MusicAlbum
  date published: 2020-07-20
album: NA EXO EMAS
  type: MusicAlbum
  date published: 2020-09-03
album: MESA STIM ZOUGLA
  type: MusicAlbum
  date published: 2020-10-02
album: AFIONIA
  type: MusicAlbum
  date published: 2020-11-30
album: SAGA, VOL. 2
  type: MusicAlbum
  date published: 2021-03-07
album: SAGA, VOL. 2
  type: MusicAlbum
  date published: 2021-03-07
album: SIGMA.PI.CREW SAGA, VOL. 1
  type: MusicAlbum
  date published: 2021-03-15
album: SIGMA.PI.CREW SAGA, VOL. 1
  type: MusicAlbum
  date published: 2021-03-15
album: SIGA
  type: MusicAlbum
  date published: 2021-04-08
album: MASTIGA
  type: MusicAlbum
  date published: 2021-06-12
album: ΠΑΡΑΛΟΓΕΣ ΑΔΙΚΙΕΣ
  type: MusicAlbum
  date published: 2022-01-09
album: ΦΑΝΤΑΣΜΑΤΑ
  type: MusicAlbum
  date published: 2024-04-27