Time Capsule
type: MusicGroup
description: thumb|upright=1.2|Time capsule plaque in Ypsilanti, Michigan, with instructions for the capsule to be recovered and opened upon the city's bicentennial, on July 4, 2023 thumb|Typewritten documents rec
popularity: 3
followers: 191
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x288df7a48cf8172c8afee16a990aad09a9d1932a9614ee880b0af644853e1939
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c66dd7a2-3c88-4e3a-9bc6-bae5ffb9423f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c66dd7a2-3c88-4e3a-9bc6-bae5ffb9423f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c66dd7a2-3c88-4e3a-9bc6-bae5ffb9423f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x288df7a48cf8172c8afee16a990aad09a9d1932a9614ee880b0af644853e1939","name":"Time Capsule","registered_at":"2026-06-20T21:08:05Z","symbol":"NIM1714860","token_address":"0xf965cbfc924192458fdd2860e7f36ed358e305de","type":"artist","uuid":"c66dd7a2-3c88-4e3a-9bc6-bae5ffb9423f"}
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 0x288df7a48cf8172c8afee16a990aad09a9d1932a9614ee880b0af644853e1939. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c66dd7a2-3c88-4e3a-9bc6-bae5ffb9423f.json and https://artists.proofprofile.net/proofs/artist/c66dd7a2-3c88-4e3a-9bc6-bae5ffb9423f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0x288df7a48cf8172c8afee16a990aad09a9d1932a9614ee880b0af644853e1939","name":"Time Capsule","registered_at":"2026-06-20T21:08:05Z","symbol":"NIM1714860","token_address":"0xf965cbfc924192458fdd2860e7f36ed358e305de","type":"artist","uuid":"c66dd7a2-3c88-4e3a-9bc6-bae5ffb9423f"}
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