thumb|Robert Goldsand (1926) Robert Goldsand (March 17, 1911September 16, 1991) was an Austrian-American classical pianist. Life Goldsand was born in Vienna, Austria-Hungary, in 1911, the son of a
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 0xcce9ea57d90ccee7a812f2ebdbd8129960b5c9d04feb9891e6e61fab63c7f4e1. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad5d23e4-829a-400e-86da-9c0bcc65846e.json and https://artists.proofprofile.net/proofs/artist/ad5d23e4-829a-400e-86da-9c0bcc65846e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liszt: Grandes études de Paganini - Rachmaninoff: Variations sur un thème de Chopin, Op. 22 (Mono Version)