Charles Bressler (April 1, 1926 – November 28, 1996) was an American tenor. He was born in Kingston, Pennsylvania, and studied at the Juilliard School with Lucia Dunham. He became a founding member o
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 0x870bf3cf5e4bab4d191f1625c1d022424d504c169d9df330c88c098874125d3a. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9ddfd2f-832e-436e-82ec-b47eaf9a90da.json and https://artists.proofprofile.net/proofs/artist/d9ddfd2f-832e-436e-82ec-b47eaf9a90da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Berlioz: Requiem, Op. 5 (Grand Messe des Morts)
Serenade to Music (From "The Merchant of Venice, Act V, Scene 1"): Andante sostenuto
Williams: Serenade to Music - Mahler: Symphony No. 8
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 0x6abcb14010472dfc96506d3113ad8f99a7ffede5807a9e2ac13d9acd9e08648d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USSM16201298.