Adell Hall Ward, better known as Vera Hall (April 6, 1902 – January 29, 1964), was an American folk singer, born in Livingston, Alabama. Best known for her 1937 song "Trouble So Hard", she was inducte
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 0xf04404b5f5450c6a54bd83b2f3ef7e743c8a203037ea97a0100eda5cd0ecfbf2. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b5bc32d-33e6-4e51-8b9d-bbca05b25e4a.json and https://artists.proofprofile.net/proofs/artist/7b5bc32d-33e6-4e51-8b9d-bbca05b25e4a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.