thumb| Rose Bampton (November 28, 1907 in Lakewood, Ohio – August 21, 2007 in Bryn Mawr, Pennsylvania) was an American opera singer who had an active international career during the 1930s and 1940s. S
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 0x601168cc644e7a5ed79f2fe41bf12a71ff9356917e35c1b54d3881cbd672ed63. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3e1a9eb-b471-4e20-b747-94e0acf2ea14.json and https://artists.proofprofile.net/proofs/artist/f3e1a9eb-b471-4e20-b747-94e0acf2ea14.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).