Peter Kolkay is an American bassoonist. In 2002, he was awarded First Prize at the Concert Artists Guild International Competition, and was the recipient of a 2004 Avery Fisher Career Grant. Kolkay i
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 0xa70321ba373ba2bc727248bb37643fb49a298bca9c27c27bf8bbbcf691ee2303. Chain 2 (Bitcoin): anchored in block 953851 (2026-06-15T23:06:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01a2b78b-26ae-421d-b714-a002e76399ab.json and https://artists.proofprofile.net/proofs/artist/01a2b78b-26ae-421d-b714-a002e76399ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Red Maple: Music for Bassoon and Strings
Sonata No. 3 in B-flat major for Violin, Oboe, Bassoon, and Continuo, ZWV 181: III. Largo
The Chamber Music Society Of Lincoln Center
Zelenka: Sonata No. 3 - Webern: Four Pieces for Violin and Piano - Mozart: String Trio in E-flat major
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 0x0f9aa59e8d8922c9e8ee632a3b31c3040d0444c3e83a19e91b82a030e838e52d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US97D0900055.
Sonata No. 3 in B-flat major for Violin, Oboe, Bassoon, and Continuo, ZWV 181: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca1bc1604ac377492fc34bde932686c09274f27f53b9975a8e473e475babaa9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US97D0900053.
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
Sonata No. 3 in B-flat major for Violin, Oboe, Bassoon, and Continuo, ZWV 181: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955a16543422d1e98c6f05c4d5a8e9298c414d163e84d83ac6406ebe9debc42. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US97D0900054.
Sonata No. 3 in B-flat major for Violin, Oboe, Bassoon, and Continuo, ZWV 181: IV. Tempo giusto (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfc4ad3120a4b26783d1c0c53aac24594d3a26b513e7a360e90db4010b3322e. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US97D0900056.