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 0x6e5df6c2c598ff3733c0391de9916e1a88fe0660ec1cf9cae475a364472e7248. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04e93d9e-cd5f-488a-93d8-ed39d5891677.json and https://artists.proofprofile.net/proofs/artist/04e93d9e-cd5f-488a-93d8-ed39d5891677.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xd8c2068a42558521449f03862b379f7c8626c187f12958a9f93a5cadb5043fcf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1926967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e6dd4dbc7405c0a844de0ec12764d3b462c8b3f8fcbee9d76d58d2b817164. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SEYOK1926968.
Virsi 479 Sinussa Kristus luotiin kerran
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620f217242f7af08f3ee06a35eef1a7744ea95fc377540b1fb3b2588b50777ac. 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/SEYOK1926969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6f5bc46e2cb4424845788271bc4f93661dccfff541f67c94a5a0d2bccca66b. 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/SEYOK1926970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97278c0eec3476d8e1a2fc4f18d4d79d558cd453095284ec5de4536ac0b1a7f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1926971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31eb13a2a42cefe8048218f11febe69225325f66c466453eb56d4eb3e2f58dc4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1926972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c35174974d1845653ed55c825b5b547cb493a1edcc4b7fcc89d346b412845e. 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/SEYOK1926974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc161f72cefff1eaeb6800446dcb49896a6a47081a4a87219c2d7f78d227906b7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/SEYOK1926975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb6377b18c49d0791c4848f023d4566a23d51208fad588731d1701fd486b460. 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/SEYOK1926977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf23db5b89971d37e78ec6898644f8f50822bc9fcb3f261e1e471fee4d62c426. 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/SEYOK1926978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce0cec2315d6555feaadd5db43c9a464dbaf1c333e4d5a0ee5fa2744a57db47. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1926979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb70375c1f13e06b6408c5a30099ea7f6adb70c146247bb8485745ac28e0c16. 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/SEYOK1926982.
Choral Concert: Tapiola Choir - Pacius, F. / Kuusisto, T. / Kilpinen, Y. / Sibelius, J. / Merikanto, O. / Hannikainen, P. / Ennola, J. / Klemetti, H.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43ae4b133284d6bc4c222d0677c3ffd34cde0d5b8d6d04715389ad5e21d2ab0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN9100011.
Musiikin tähtihetkiä 20 - Hiljentymisen hetkiin - 40 rakastettua hengellistä laulua
Granqvist: En voi sua unhottaa poies (I Can Never Forget Thee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e930a8c7ef0a5d9c3975013e3c430e0697ea1251b649bf0ae0113fb1fb922b9. 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/FIFIN9202100.
Krokotiili herbertti (arr. T. Ali-Mattila for soprano, baritone and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cc08f5d09a60aeda5ea3c5333a4f5d0df756d613e8254df5d78d0d9fba41ed. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FINDE0500046.
Janojussin maenlasku (arr. J. Tikka for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423807e2529a19b2c9ca221a3955ddc06b7d7faee8a03534cb0c08a0ca60dcc8. 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/FINDE0500053.
Hyvin hiljaa (arr. T. Nicolau for orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67209d4384a1322c28593f5c238fad88d8d0b7b9e40ecdc389028c41a169abb3. 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/FINDE0500055.
Vuodet - Polyteknikkojen Kuoro 100 vuotta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c98254659568c2f3a2a0317b709e8278ef8354bd741917ff527c7036b71f09b. 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/FI8PT1400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1302fb882262ea263334e2ce5bf929de56ca0b81ca5659d58362155ecc1025. 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/FI8PT1400049.
Vocal Recital: Isokoski, Soile - Finnish Sacred Songs (Suomalainen Rukous)
Tulkaa kaikki kotiin - Siionin lauluja ja virsiä soittimin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582e8d947f65c83be38ac7a35b86cc8415031b9704509a32ff1970b169cebc3f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a76b4685ebaca5873521b1b810d5348ae5e992bc4d01868188eb6ed94cdb8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019f6db277667f7e5253b88c103a9336e1b77023ecdb453d358a08025d9a63fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba295344af9f76b9f8c6242336b07fecaed99622cb3f355acc16bd0d8971af1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1378762a73dcd89bd8b3b87821b5936fb7e288e55984022e39e943f49d9b1a39. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace2ea3acc57775c390c97460d7101d14bd4171de416e7f5f3f61240b6cf663a. 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/FISRK2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c00050ce3af4aa7f1d9f434212648459a37f603af91a58fcc68f66d99fa5fbc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfce6db99298a90f7835879d6e1f37986bd903da993ef2cadeaaf6117514a2c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bb8c9b0bf165ee02b31bfafc5584459237bbeeb030c2e813aacc6321038569. 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/FISRK2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8816a22c525ae8a09e28e2c930aea325364bdc5f01b5970cda53828754f19e78. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38bf98b68846927fe217b0b142b6b4832b1faf04be2659056ff96d290875cc1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6e491c44bda1fe380a57ee3732eee90c5345e967e3bc8df9f294d54e63195a. 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/FISRK2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2149b18c8a509a927ea9a81e28c82859fadc848aab1cdddcb94782c59ff11521. 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/FISRK2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1fb57f1d2a1f2fdc4ea201de11a515e74064adc3708c3b9d9be36a2a8d129f. 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/FISRK2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdfe610c340d9bfc5e3e6cbb792970b5bde75228ddbde568eb0b70d9d771c59. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652960f68bf240cab6bb48c131bbeb0b0540c56748b652358c08e8933ba152f3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d039086f83942af310e0305ae73c5eea1fd86582399cdaaff50b0730e87fd33. 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/FISRK2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf9060af0fd94025d79baedb380e178b3493035021e7a73f5d71db7de64adb6. 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/FISRK2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2469a674d5b03fa33f4bf73adf5615e4b3422b3443c5c7f2ec568d73952574. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd230d22dde262c92bd2ffb986394eee2ee2ed8aa1eff8565a9e20ab69c715c82. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FISRK2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d18f9d0e391ae4133c4e24df5b1a5156df2a7d3ce047ec80d044a83a7c7f49. 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/FISRK2400037.
Suomalaista Musiikkia Huilulle Ja Jousiorkesterille II
Christmas Choral Music - Sibelius, J. / Hannikainen, P. / Palmgren, S. / Merikanto, O. / Kotilainen, O. / Madetoja, L.