thumb|225px|The Quotations performing at the hall of the Hilton Pittsburgh in Pittsburgh, Pennsylvania, during their participation in the doo wop festival celebrated in this city at the Benedum Center
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 0x16fc85cc0f85b5e59964790d43bfa5f439df441bc4b33d1c18d4f87582252a20. 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/4e54c612-dd53-4144-af0d-9c3ac8981a50.json and https://artists.proofprofile.net/proofs/artist/4e54c612-dd53-4144-af0d-9c3ac8981a50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).