Especia were a Japanese idol girl group formed in 2012. They participated in the 2015 Tokyo Idol Festival. Their single "Aviator/Boogie Aroma" reached the 28th place on the Weekly Oricon Singles Chart
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441508296e26fce67d6428c2f50a0ba1663f7628809457c38d7e3afac1803301. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2310306d-6d4c-429d-850a-444a2eed0df0.json and https://artists.proofprofile.net/proofs/artist/2310306d-6d4c-429d-850a-444a2eed0df0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).