Sweet Vacation
type: MusicGroup
genre: j-dance
genre: shibuya-kei
description: Sweet Vacation（スウィート・バケイション）is a Japanese music unit made of members Hayakawa Daichi and Thai vocalist May. Both come from a history of high level universities. Hayakawa left Tokyo University's Gradua
popularity: 5
followers: 2271
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9f7dde67f39b3e1c12d997b542a75daf49da08aab37f7525e8dee9ab615ab8b5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a240c1fa-c20c-497c-95e8-dc623719501b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a240c1fa-c20c-497c-95e8-dc623719501b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a240c1fa-c20c-497c-95e8-dc623719501b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9f7dde67f39b3e1c12d997b542a75daf49da08aab37f7525e8dee9ab615ab8b5","name":"Sweet Vacation","registered_at":"2026-06-20T06:08:06Z","symbol":"NIM1536122","token_address":"0x2acc3fe20042f9c222a7b11c4584ac7a207d84e9","type":"artist","uuid":"a240c1fa-c20c-497c-95e8-dc623719501b"}
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 0x9f7dde67f39b3e1c12d997b542a75daf49da08aab37f7525e8dee9ab615ab8b5. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a240c1fa-c20c-497c-95e8-dc623719501b.json and https://artists.proofprofile.net/proofs/artist/a240c1fa-c20c-497c-95e8-dc623719501b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0x9f7dde67f39b3e1c12d997b542a75daf49da08aab37f7525e8dee9ab615ab8b5","name":"Sweet Vacation","registered_at":"2026-06-20T06:08:06Z","symbol":"NIM1536122","token_address":"0x2acc3fe20042f9c222a7b11c4584ac7a207d84e9","type":"artist","uuid":"a240c1fa-c20c-497c-95e8-dc623719501b"}
album: Do The Vacation!!
  type: MusicAlbum
  date published: 2007
album: More the Vacation!!
  type: MusicAlbum
  date published: 2008-04-16
album: I miss you -ep-
  type: MusicAlbum
  date published: 2008-08-20
album: さよならマイデイズ
  type: MusicAlbum
  date published: 2009-02-18
album: pop save the world!!
  type: MusicAlbum
  date published: 2009-08-05
album: Re;未来派宣言
  type: MusicAlbum
  date published: 2010-07-14