thumb|Kalle Randalu in 2013 Kalle Randalu (born 25 November 1956) is an Estonian pianist. Randalu was born in Tallinn, and trained at the Moscow Conservatory under Lev Vlassenko. In 1981-82 Randalu w
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 0xe4b9021ec08d04e26269a89eade9568899ba754e097874aed26a61890d72a432. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/717f051d-16f3-4234-9ea5-1c4fe144a853.json and https://artists.proofprofile.net/proofs/artist/717f051d-16f3-4234-9ea5-1c4fe144a853.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brahms: Klaviertrios Op. 8, Op. 87, Op. 101, Horntrio Op. 40 & Klarinettentrio Op. 114
Trio für Klavier, Violine und Violoncello No. 1 in B Major, Op. 8: I. Allegro con brio
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 0x8afe274d09e35fcf08b753b5d56dd4a82b3c525a338ae61dd76ac3fa9b5771c1. 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/DEX991150101.
Trio für Klavier, Violine und Violoncello No. 1 in B Major, Op. 8: II. Scherzo. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14fe47fd0ddeafe5111ceac0e2a74cfeb2b315b1aeafb2eecda517e2b5c3cb9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEX991150102.
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
Vasks, P.: Gramata Cellam / Partita / Episodi E Canto Perpetuo
Liszt: Via crucis, S. 53 - Pärt: Sacred Choral Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef739d47fe8daa3cc8247bab847d109122cabe27a41d303a0dff3bbbac9aafa4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FINDE1900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7a1ea13afad0139f3f2b5fa42d945a18253bda11d10bf0afefa0645bd458f5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FINDE1900061.
Mozart: Piano Concerto No. 22 in E-Flat Major, K. 482 - Strauss: Le bourgeois gentilhomme, Op. 60, TrV 228c (Live)
Great Maestros, Vol. 6: Neeme Järvi (Live)
Beethoven: Piano Concerto No. 4 in G Major, Op. 58 - Brahms: Symphony No. 2 in D Major, Op. 73 (Live)
Beethoven: Piano Concerto No. 3 in C Minor, Op. 37 - Brahms: Symphony No. 1 in C Minor, Op. 68 (Live)
Beethoven: Piano Concerto No. 2 - Brahms: Symphony No 4
Schumann & Bruch: Pieces for Clarinets & Piano
Die Jahreszeiten, op. 37a: II. Februar: Karneval
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90840f699068a246c824a51650bc8f491852f20858aef04ac2e3ba5039708d6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEA549501130.
Die Jahreszeiten, op. 37a: VI. Juni: Barkarole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839a14cbe57c24e53732846bd088a468001d0c66026f653e282f407dd218474a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEA549501170.
Saitenspruenge im Duett - Gitarre und Klavier
Mozart: Concerto for Piano and Orchestra No. 21 in C Major, K. 467 (Digitally Remastered)
ヒンデミット:木管楽器のためのソナタ集
Les Grands Peintres et la Musique (Famous Painters' Music Collection): Gauguin, Vol. 7/16