bless4 is a Japanese vocal ensemble from the United States consisting of four siblings from the Kawamitsu family. Youngest sister Akino has her own solo musical career, and youngest brother Aiki has a
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 0x62748535dbc2745871acdc3617df2b03ff57b562fef18da4b4199fec78992c4f. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8e818e6-a8cc-46dd-8d17-5219b8a64536.json and https://artists.proofprofile.net/proofs/artist/b8e818e6-a8cc-46dd-8d17-5219b8a64536.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).