Akai
type: MusicGroup
description: Akai (, ) was a Japanese electronics manufacturer, established as Akai Electric Company Ltd in Tokyo in 1929. It was best known outside Japan for its tape recorders during the 1960s and 1970s. The com
popularity: 17
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf2214e675890dfbe0cc78858b339c65c6e17ccec1832e92db9833577ba78b078
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953654
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953654
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4a4fc184-5d36-4118-b253-8eaf290844ba.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4a4fc184-5d36-4118-b253-8eaf290844ba.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4a4fc184-5d36-4118-b253-8eaf290844ba
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T16:26:51Z
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 0xf2214e675890dfbe0cc78858b339c65c6e17ccec1832e92db9833577ba78b078. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a4fc184-5d36-4118-b253-8eaf290844ba.json and https://artists.proofprofile.net/proofs/artist/4a4fc184-5d36-4118-b253-8eaf290844ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T16:26:51Z