Max Janowski (1912 – April 8, 1991) was a composer of Jewish liturgical music, a conductor, choir director, and voice teacher. Born in Berlin into a musical family, Max was the son of Chayim Janowski
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 0x675a51e5f00b3ceb1fa2cefd62996a2c01e79ddd54eb800aacc5580cc55f82f3. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6155b3f7-2178-40ee-a19d-8a0d5f3e0d3d.json and https://artists.proofprofile.net/proofs/artist/6155b3f7-2178-40ee-a19d-8a0d5f3e0d3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Janowski: Avinu Malkeinu (Arr. Clements for Cello & Vocal Ensemble)
Milken Archive Digital Vol. 4 Album 9: Cycle of Life in Synagogue & Home – Sabbath Day
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d19e46aa3c2dfcb065de7cd3e7aa0e3ccb3c29bc30034c4895ce40fa8516e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190955799.