Noa or NOA may refer to: People Noa (name) Noa (Achinoam Nini), Israeli singer Noa (Japanese singer), Japanese singer Noa (Japanese singer, born 2000), Japanese singer Noa, one of the five daug
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 0xdf303effa11df1b03e21cbb52f3e895655ae6419ce77dca8d2c7b85ff27f0912. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7275eb4c-82b2-4755-abb3-87148a7fb367.json and https://artists.proofprofile.net/proofs/artist/7275eb4c-82b2-4755-abb3-87148a7fb367.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).