thumb|300px|right|Buddy Lee rolled up his sleeve to promote blood donation on behalf of the American Red Cross in an ad after the September 11, 2001, attacks. Buddy Lee was an advertising mascot for
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8720c7bca0907cad0d5edd7e564390d598cbb64247e1bc5ad286d147da234fb2. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b075873-26c3-47f9-961b-c0239479f610.json and https://artists.proofprofile.net/proofs/artist/4b075873-26c3-47f9-961b-c0239479f610.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Memories (Styles P "Good Times" Remixed)