thumb|Raoul Koczalski Raoul Armand Jerzy (von) Koczalski (3 January 1884 – 24 November 1948) was a Polish pianist and composer. He also used the pseudonym Georg Armand(o) Koczalski.Peter Seidle: "Kocz
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 0xc49e94ed90e27b60428005515ff70067ae0e88d692ed59786ded53a6dc29774b. Chain 2 (Bitcoin): anchored in block 953794 (2026-06-15T13:43:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dfe4b357-d463-4fdb-9ff4-c9b11b2bd7a7.json and https://artists.proofprofile.net/proofs/artist/dfe4b357-d463-4fdb-9ff4-c9b11b2bd7a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Recital: Koczalski, Raoul - Chopin - Mozart - Liszt - Paderewski - Tchaikovsky - Rachmaninov - Bartok