Sono, SONO, or SoNo may refer to: Places SoNo, Atlanta, a district in the city of Atlanta, Georgia Sono Department, a department in Burkina Faso South Norfolk, Virginia, a former independent city
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 0x840edaf213170b59a396d708f2e485e5209f01ead6b95a4c62a7bab4b8a3cb58. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/477701f4-34a6-4536-b116-63cf5c860622.json and https://artists.proofprofile.net/proofs/artist/477701f4-34a6-4536-b116-63cf5c860622.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).