Nine by Nine (, stylized as NINE BY NINE or 9x9) was a nine-member Thai boy group formed in 2018. The members were brought together in a special one-year project created in collaboration of 4Nologue w
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 0xaaae8aa459abdd0df135d53338dd4b4adcd250674efb34b56cc75632f33fb8f8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01dfd16e-2a28-4c27-9cf7-a62e2d59ac33.json and https://artists.proofprofile.net/proofs/artist/01dfd16e-2a28-4c27-9cf7-a62e2d59ac33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).