thumb|250px|Sailboats and Performing Arts Building Camp Wekeela is a 293-acre sleep-away summer camp on Little Bear Pond in Hartford, Maine. It is a traditional resident summer camp for boys and girl
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 0x91ff50334b85e0ad2c3c2594e075f7b40c43ee4ee40f50701c9048461e3400b2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7712b060-6873-4ad5-836a-998569bed162.json and https://artists.proofprofile.net/proofs/artist/7712b060-6873-4ad5-836a-998569bed162.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).