Tõnu Kõrvits (born 9 April 1969 in Tallinn) is an Estonian composer. In 1994 he graduated from the Estonian Academy of Music and Theatre with specialty in composition. Since 2001 he has taught compo
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 0x105d43ebbe4068cb018fd0a096a4f055e49d1263382caf471a8965574c7278ed. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e87e0eb-f96e-4034-8a14-a253201b0fec.json and https://artists.proofprofile.net/proofs/artist/0e87e0eb-f96e-4034-8a14-a253201b0fec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Moorland Elegies: No. 2, Silent Is the House
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 0x196cc8f637e611f4b4f2b98b2aa01b58a14009122f4c09e557fd1121e16c51ca. 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/FINDE1700002.
Moorland Elegies: No. 4, Fall, Leaves, Fall
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74168b0657ccf3fb6036ff1971b628e9a643a9a122b19a97a67c57a629d44376. 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/FINDE1700004.
Moorland Elegies: No. 5, She Dried Her Tears
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896bc80b94f58aff5936aa38c224f1a05fba3feb0f71be886cf139eababf5d41. 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/FINDE1700005.
Moorland Elegies: No. 6, Moonlight, Summer Moonlight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccf2136dfc9ca02c5c57b9ed408f26f5a5eb4a0b0e982a04903de4059f026c8. 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/FINDE1700006.
Moorland Elegies: No. 7, The Sun Has Set
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24ecd356eeb99f7bb7e76a7608d62d054112826446eaa117bf712db031fca59. 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/FINDE1700007.
Moorland Elegies: No. 8, The Starry Night Shall Tidings Bring
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae02cfbe880ef37ce9f2fcc02528af115532e403aaf806949afdf7906c3b0f. 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/FINDE1700008.
Moorland Elegies: No. 9, Month After Month
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979704dd5d9dace2c719f62efb17351338381b0a2e7ae4c0f4565288b8015055. 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/FINDE1700009.
Moorland Elegies: No. 3, The Night Is Darkening Round Me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a144d133d239a964e9267b62584d1bf612fb65fa788d17742d0b0b7bdab8d7f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FINDE1700003.
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 0x40d41f951fff19b01ed57df848f75d8492588b5eb52fe90787f36a17f645ac9c. 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/DEB331332701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555355be62c48dab1e69f1ebc55369202d650ca1a173968d7f6efd174a7c0069. 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/DEB331332702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2107f9c08ea01b2db6794edbe12ef8e41df6f752afa0e7fd85bf9706747ba0. 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/DEB331332704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78fadfd8f88df4140c1cb1e2d1c6e9c97e12404d465f483a0edbadd3c021ed4. 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/DEB331332710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ca79fda3cb1c63ff6e5b822b7acf55760986543220fd9440303a94fa28b49e. 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/DEB331332717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96192722febdb00055461a7fff89a2cef7dfdd01aa0c0034918c3a540bd48846. 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/DEB331332709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaab05161aaf92acb7e2bf2f3407c515f3564591ebb4a32c06469f85f1582dad. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEB331332718.
Kreek's Notebook: I. Nüüd ole, Jeesus, kiidetud
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4312d7044887d2ac53a997acedf9eb88f17be4971a6b73e0c9d32decb70899. 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/GBAJY1396801.
Kreek's Notebook: II. Nüüd on See päev ju lõppenud –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf4e39934f3fcb2fbc6720fb87291a13eba2b4817fc0608c0d9249eae8c37fe. 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/GBAJY1396802.
Kreek's Notebook: V. Su hooleks ennast annan ma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858e82526b5c293a1edd9cf040144204035fe2651262387c7ced1528050e7705. 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/GBAJY1396805.
Kreek's Notebook: IV. Oh võta, armas Jeesus, vastu mult –
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc92700aeedb7a5069147c9c033a3b612d4fcfffac2b70a203ff7f86228eeff. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAJY1396804.
Kreek's Notebook: VI. Lenda üles kurbtusest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5327abae5f5091d0d2b14042fcbb1fde6272d1493e0064097e93e0d360e90bd4. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBAJY1396806.
Kreek's Notebook: VII. Minu hing, oh ole rõõmus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780aba692f64f9051dca2d97003d374880fe95828906555d387f9cade5fb1b1e. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBAJY1396807.
Kõrvits Kreegi vihik II Nüüd on see päev ju lõppenud
Cyrillus Kreek Requiem / Tõnu Kõrvits Kreegi vihik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb109d96bd5f561c57c7e1f39f39caf63f6c7c44e504cde22e6d52d686a579ebe. 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/EEGP31900002.
Kõrvits Kreegi vihik III Ma kiitlen ükspäinis neist verisist haavus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ea8579eacc26b253d7c36c2fcb9885c1c6802d4f3d6b64d25f580df59f683e. 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/EEGP31900003.
06 Kõrvits Kreegi vihik VI Lenda üles kurbtusest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedfa0f3d88802a3e2fa0d17868247849c6c4f7b966ca917baff3fd206d944eb. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/EEGP31900006.
Kõrvits Kreegi vihik I Nüüd ole, Jeesus kiidetud
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48899804926d90ab38d3723a6bafd9bae5fb2297529f0fccfba604e3a8be0e2e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/EEGP31900001.
Kõrvits Kreegi vihik IV Oh võta, armas Jeesus, vastu mult
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b886a60b3e08ab86eeb8e7a4367b1770a1ce0ba4844ef26c47d9a799e19af. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/EEGP31900004.
Kõrvits Kreegi vihik V Su hooleks ennast annan ma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ec26fdf9865703ff5e21c94b5237d85bc0ab2599d2daceedceb1691dce3b6f. 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/EEGP31900005.
Kõrvits Kreegi vihik VIII Ma vaatan üles mäele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d83fbebbea496f8498c91d0954741f0120dab3d61d929dcb760010fd8aa944b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/EEGP31900008.