Ohio ( ) is a state in the Midwestern region of the United States. It borders the Canadian province of Ontario to the north (through Lake Erie), Pennsylvania to the east, West Virginia to the southeas
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 0xd9f837741a08c3e3e71189f25970a5aedc70d03eff4c6dedcf6658e2df1d7e71. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bab9524b-6638-4e04-a46d-b6e2a457038f.json and https://artists.proofprofile.net/proofs/artist/bab9524b-6638-4e04-a46d-b6e2a457038f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).