Donald John Gramm (February 26, 1927 – June 2, 1983) was an American bass-baritone whose career was divided between opera and concert performances. His appearances were primarily limited to the United
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 0x3290193b4100e2c8b56c12a11531652c3a64b9d5955db8046e63a376e48acff5. Chain 2 (Bitcoin): anchored in block 953854 (2026-06-15T23:16:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0226059d-7ab3-421f-9466-b4b276df34e0.json and https://artists.proofprofile.net/proofs/artist/0226059d-7ab3-421f-9466-b4b276df34e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).