right|thumb|242x242px|Peter, a slave from Louisiana, in 1863. The scars are the result of a whipping by his overseer. Slavery is the ownership of a person as property, especially in regard to their l
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 0x25e79fe6229ef9acd76bc9ea0ac98b7dc3e5b3bb48a312c3ad4dfe720191e513. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/00d60099-9421-4e5e-ad29-45b9a54aff3d.json and https://artists.proofprofile.net/proofs/artist/00d60099-9421-4e5e-ad29-45b9a54aff3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).