Truls Olaf Otterbech Mørk (born 25 April 1961) is a Norwegian cellist. Biography Mørk was born in Bergen, Norway to a cellist father, John Fritjof Mørk, and a pianist mother, Turid Otterbech. His m
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 0x49c99c93fcc48d5c1305ba87f5ed48826c3efbdb67bd04f9cbb79e33244e6095. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6e1a26b-1d3c-456b-a83f-b07380b50497.json and https://artists.proofprofile.net/proofs/artist/f6e1a26b-1d3c-456b-a83f-b07380b50497.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Trio No. 5 in D Major, Op. 70 No. 1 "Geistertrio": I. Allegro vivace e con brio - Live
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 0xa5be7872a71d54e36aacce835d2a7acd1584fcbc48155091ffa2fee208faade6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962201841.
Piano Trio in G Minor, Op. 15: III. Finale. Presto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fff974fdc00978201bd11e59da08c9d8d53654614775f108ba1d1094374b1d. 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/DEN962201853.
Piano Trio No. 5 in D Major, Op. 70 No. 1 "Geistertrio": II. Largo assai ed espressivo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e98ef1dddf2b9a9b73861a0861a8f693bae33e075fdd11effa0fb1875bce45. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/DEN962201842.
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
Piano Trio No. 5 in D Major, Op. 70 No. 1 "Geistertrio": III. Presto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0335b53305ad66e672a4689b259e74fd1230a287e3e9ba2a21e391a875452242. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEN962201843.
The Lyrinx Recordings (1991·95): Brahms: Complete works for clarinet – Schumann: 3 Fantasiestücke Op. 73
Cello Concerto in C Minor, Op. 21: II. Adagio -
Atterberg: Cello Concerto / Brahms: String Sextet No. 2 (Arr. for String Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9adad3281f4be411ac663f77fd67e6ab8e96d5744d757282a4ca36fc7d3b81. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEAEP0604020.