Reo or REO may refer to: People with the name Reo Fortune (1903–1979), New Zealand social anthropologist Reo Griffiths (born 2000), English footballer Reo Hatate (旗手 怜央, born 1997), Japanese football
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 0x0f8f66713b9313dda17eddeeb9ecf97dcd33c7c2c681ad814cec752d8a5e8a85. 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/4a83ff7c-8cd3-477f-94b4-153d65215cb3.json and https://artists.proofprofile.net/proofs/artist/4a83ff7c-8cd3-477f-94b4-153d65215cb3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).