Bernard Greenhouse (January 3, 1916 – May 13, 2011) was an American cellist and one of the founding members of the Beaux Arts Trio. Life and career Greenhouse was born in Newark, New Jersey and began
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 0x4c51268cc38a8add7ff868c7f4261ef5960d73d4262c24f36880b819119648b4. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d75fbf3c-7ce2-4f6f-9dee-a6c54d04269e.json and https://artists.proofprofile.net/proofs/artist/d75fbf3c-7ce2-4f6f-9dee-a6c54d04269e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carter: Cello Sonata & Piano Sonata - Del Tredici: Fantasy Pieces - Persichetti: Serenade No. 10
Clarinet Trio in A minor, Op. 114: 1. Allegro
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 0x733fb94c0caeeacd9bceaccaf2dfcdedebb2c0d55d2a1e7e957e4440c269c143. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507812101.