thumb|282x282px|Portrait of Tchivzhel Edvard Tchivzhel (Latvian: Edvards Čivželis) (pronounced CHIV-zhel) (b. January 29, 1944) is a Latvian-born conductor and music director of the Greenville Symphon
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 0xdc02d7551cc087d0ad0959e06d7a960730327f2635d39bebf094d8cefd331486. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b291f07a-c4fa-4256-a7e7-b7b7363a9971.json and https://artists.proofprofile.net/proofs/artist/b291f07a-c4fa-4256-a7e7-b7b7363a9971.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Dello Joio: Diversions Of Angels; Seraphic Dialogue; Exaltation
Rhapsody on a Theme of Paganini, Op. 43: Variation No. 18: Andante cantabile - Live from York Theatre, Seymour Centre, Sydney, 2000
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 0x2ca22a8ae36235643a628f30172ac817ae61c433835df2052e43fc225a7861d8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00750719 — a six-check JSON result.
Piano Concerto No. 3 in D Minor, Op. 30: III. Alla breve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773ed58501947f8463498fb16ff38d49872bd70f0e6d644fceba8b4b21f418d6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/AUAB09650258 — a six-check JSON result.
Piano Concerto No. 3 in D Minor, Op. 30: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce868afed3bb2ff520dc42b478592b4f11e0aed523fe55c98a0fa1a577e61117. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/AUAB09650259 — a six-check JSON result.
Piano Concerto No. 3 in D Minor, Op. 30: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d53b0921ec3e64ba350f8e20d879d34f3d815aa7c143ead717bd5101b976fb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/AUAB09650260 — a six-check JSON result.
Rhapsody on a Theme of Paganini, Op. 43: Variation No. 18: Andante cantabile - Live Recording
First Time Classics: The Moment You Fell in Love with Classical Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca22a8ae36235643a628f30172ac817ae61c433835df2052e43fc225a7861d8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUAB00750719 — a six-check JSON result.