Big Ocean () is the first hard of hearing South Korean boy band, formed under Parastar Entertainment. The group consists of three members: Lee Chan-yeon, PJ, and Kim Ji-seok. They debuted on April 20,
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f405c49c0ebefb671936b00f13dac705567b26418da9cc7ad528c9d8b25f8d. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e26a41ba-4ce6-40ce-8662-1d7b9b74d1f6.json and https://artists.proofprofile.net/proofs/artist/e26a41ba-4ce6-40ce-8662-1d7b9b74d1f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
IM HIM (feat. Gee El, Figg Newton, Siete Gang Yabbie & Pimpsy)