Stefan Askenase (10 July 189618 October 1985) was a Polish-Belgian classical pianist and pedagogue. Biography Askenase was born in Lviv, then known as Lemberg, into a Jewish family. At the age of fi
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 0x8c68ceec8470a0b5b7a62dec5f02cb8d571062b062b4d3f8123a3d5d53340f0b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8622aad-7d94-4e63-9970-563cde415a2a.json and https://artists.proofprofile.net/proofs/artist/e8622aad-7d94-4e63-9970-563cde415a2a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Une soirée romantique avec Liszt et Chopin (Mono Version)
Mozart, Schumann & Chopin: Piano Works (Live)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x3c8f78aca17e8cba8c144ddd059acaec66c7c9158080a7296222964af0a4ad8c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055330307 — a six-check JSON result.
Piano Concerto No. 2 in F minor, Op. 21: 1. Maestoso
Chopin: Konzert für Klavier und Orchester Nr.2 f-moll op.21 / Polonaisen Nr.6 op.53 & Nr. 3 op. 40 Nr.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3356aafa95b1856dbf88ae297c0aff5b1ab5b524aecd2455e253d7f814e4d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056200991 — a six-check JSON result.
Piano Concerto No. 2 in F minor, Op. 21: 2. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5e833fc209b6a39f19786d335627ad257ab4e433e80710fe9e8273c70e4693. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056200992 — a six-check JSON result.
Polonaise No. 3 in A Major, Op. 40 No. 1 "Military"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168ef97a03b2ed934112ec810365f44ddc13ef6fb71407e3d92d68e0d68ac9c5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056201010 — a six-check JSON result.