Calc
type: MusicGroup
genre: folk
genre: french indie pop
popularity: 2
followers: 374
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x627efa3fba528f9b163465df4e91025a783317f5baaed6861121649dac943c17
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ecd67aa-7464-40c9-92fd-951f41718794.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ecd67aa-7464-40c9-92fd-951f41718794.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5ecd67aa-7464-40c9-92fd-951f41718794
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627efa3fba528f9b163465df4e91025a783317f5baaed6861121649dac943c17. 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/5ecd67aa-7464-40c9-92fd-951f41718794.json and https://artists.proofprofile.net/proofs/artist/5ecd67aa-7464-40c9-92fd-951f41718794.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: Something Sweet
  type: MusicAlbum
  date published: 1999-01-01
album: Any Downs at All
  type: MusicAlbum
  date published: 2003-02-10
album: Twelve Steps to Whatever
  type: MusicAlbum
  date published: 2005-02-14
album: Real to Reel
  type: MusicAlbum
  date published: 2005-09-26
album: Dance of the Nerve
  type: MusicAlbum
  date published: 2007-10-08
album: Any Downs at All
  type: MusicAlbum
  date published: 2008-09-29
album: Danse of the Nerve
  type: MusicAlbum
  date published: 2010-09-01
album: Raise You Six / The Moon Is A Frozen Canterloop
  type: MusicAlbum
  date published: 2014-04-05
album: Lost Serenades (Remastered)
  type: MusicAlbum
  date published: 2017-09-22