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 0x51de00777eaa939bc29ee80544ab9e17c2eafebefa826d7405ad648ea32e3f88. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f72e32b8-7ac5-4d3e-8dc8-c6e71401d164.json and https://artists.proofprofile.net/proofs/artist/f72e32b8-7ac5-4d3e-8dc8-c6e71401d164.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Oskar Merikannon kauneimmat [Best of Oskar Merikanto]
Merikanto : Kesäillan valssi, Op. 1 No. 3 (Summer Evening Waltz)
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 0xaa7a3496309793da601e82544dc9249a2bf8569b59d9f763396859583c4543aa. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8200200 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a87ca1474e171f97fbe493fe9954fbdc028639b9878465d167d045f795a36eb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN9200304 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedf0b603af56e392f62e8b8c34fce945631314d7630df84e782b500c8181dfa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN9200700 — a six-check JSON result.
Merikanto : Mä oksalla ylimmällä, Op. 26 (On the Highest Tree-Top)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd170d68e659bf98256cd9cd64bde113f4b2a0a55c3fc7c55fcd8c846f8273f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8200300 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c875d2d75d0e232e1472bc6a78fc509c28409345555876ea0227934178e832. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFMF7500200 — a six-check JSON result.
Merikanto : Pai, pai paitaressu, Op. 2 No. 1 (Bye, Bye Lullabye)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976ec395e893d2196ad93258458d240b64d0a8d1cefab4010f3202d92400e964. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFMF7500300 — a six-check JSON result.
Merikanto : Itkevä huilu, Op. 52 No. 4 (The Weeping Flute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d1f344cabeed4eb16cd6747242eadddd7bbaa3bfe272eb23c6276de033a5fb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8400300 — a six-check JSON result.
Merikanto : Merellä, Op. 47 No. 4 (At Sea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da94a8cece12a263f031bf1a4c797a8eae5cfd2641ee120a6bf7b20d994886d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFMF7501100 — a six-check JSON result.
Merikanto : Soi vienosti murheeni soitto, Op. 36 No. 3 (Play Softly, Thou Tune Of My Mourning)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469a0b25eb3f145d969e3f54fcd29bd801643d859e43f7cf023ab6cd9dd68995. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8400500 — a six-check JSON result.
Merikanto : Lastentaru takkavalkealla Op.82 No.3 [Fairy Tale By The Fireside]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fa132fc1102c11f984523a7781e0abc7aaa33a6ea2cc4bea2a788e6335c763. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8400600 — a six-check JSON result.
Merikanto : Idyll, Op. 73 No. 1 (Idylli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81732272033b82326d2bfbe19dd14bb19388221f22467c368e841ad182be10b7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN9200800 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4722d26f7442e994cbc462be04bf8de4c5ad955e2ae9576a624d7eee43b530. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN9200900 — a six-check JSON result.
Merikanto : Oi, muistatko vielä sen virren, Op. 52 No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291a6de6e6240ee1f287d6277ea78486629926bcd9d8a191b8e89d49b40a4858. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8400700 — a six-check JSON result.
Merikanto : Laatokka, Op. 83 No. 1 (Lake Ladoga)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aa243dada35db14857de02cb71be20cc3e8a49a10a9055f8f5017c05f9cc88. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8400800 — a six-check JSON result.
Merikanto : Miksi laulan, Op. 20 No. 2 (Why Do I Sing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416f8a5c5865a1b0e90e5d485ddafb73061725338b38ac58b5ddc393dc74c172. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFMF7500400 — a six-check JSON result.
Merikanto : Myrskylintu, Op. 30 No. 4 (The Thunderbird)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90f11628651ec5a0b78fd73f0c883f657f9bb5a9b02010f1fcc20d549d42dfd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFMF7500500 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0142b2bbfc1219cacf81075e8c1012c4c3e8b17f3c76147e724d8fdfcfef09. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8400900 — a six-check JSON result.
Merikanto : Kesäillan idylli, Op. 16 No. 2 (Summer Evening's Idyll)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7fc87384bc6ce12eaa5dfed2e9b22ea783b2b689ccd8b5f2c3125d3b9643d3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8200400 — a six-check JSON result.
The Sibelius Edition, Vol. 11: Choral Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a778f00adba03228708dd7f7d61da3e04385a091e5da5d82d2faee3f71a44. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAET1030270 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f6d7f72a07d3089a0ce77c837c39966b5ad852e085cd09ea424a78e4d1d6e9. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8600093 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b106c515b0cf1d4f2180a9ea5f7183a969a07bfcda4910c047461daa169e75d. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8200700 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7a3496309793da601e82544dc9249a2bf8569b59d9f763396859583c4543aa. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8200200 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469a0b25eb3f145d969e3f54fcd29bd801643d859e43f7cf023ab6cd9dd68995. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIFIN8400500 — a six-check JSON result.
Sibelius: Jedermann, Op. 83 / Belshazzar's Feast, Op. 51 / The Countess's Portrait
Korpirastas - Toni Edelmannin sävellyksiä Einari Vuorelan runoihin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3631a01a712c8dc6a7c88ce04a068a775907fbcb223dd0c316346449befe30ce. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIWMA0900081 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdc9f9984c9bd94610819a82d36cd7815972f372a533b7926cf4db5e4057551. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIWMA0900084 — a six-check JSON result.
Musiikin tähtihetkiä 15 - Oskar Merikanto
The Origin of Fire, Op. 32: Tulen synty (the origin of fire), Op. 32 [Revised Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa495689d48a0d33d5b5fa121987df3faabeed81c275cd98d5472427b240cb95. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAED8614010 — a six-check JSON result.
Jääkärien marssi (Jager March), Op. 91a [version for male chorus and orchestra]: Suomen Jaakarien Marssi [Finnish Jager March], Op. 91a
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4578bdaf4094f84538998d8406b9d16382cccfc10b7e4d11594c4330d5e9f770. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAED8614030 — a six-check JSON result.
Finlandia-hymni: Finlandia, Op. 26 (with Finlandia-Hymn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d4764ff5f1a8ace5f3544505f4cc4fe55a3f1a0ccc656020aa08f0651d0941. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAED8614070 — a six-check JSON result.
Sibelius, J.: Sibelius Edition, Vol. 5 - Theatre Music
Vocal Recital: Hynninen, Jorma / Ruuttunen, Esa / Tiilikainen, Sauli - Kokkonen, J. / Dvorak, A. / Pylkkanen, T. / Tikka, K. / Piiparinen, M.
Viimeiset kiusaukset (The Last Temptations): The Last Temptations: Paavon virsi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d0b2a30e6f8a87b16393be3bfb49ba81e01f3662cc072ee193c16e1553272a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FINDE9800127 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d5ac677e0060b89186d784fc63eba643207ffc6bd39dc4ee3169645d1b919. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FINDE9800130 — a six-check JSON result.
Sibelius: Music for Mixed and Female Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c2d49a6cb9ce96b4586fb3bec0663efd5cef438950d29166727d42baa64007. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEJ9898400 — a six-check JSON result.
Sibelius: Works for Mixed Choir A Cappella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e63a667610f2ac00eeefe49a35c09e4cfa1e8dfd2359f55b2380b90e7e4b615. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEI9625100 — a six-check JSON result.
Korpimaan lauluja - Toni Edelmannin sävellyksiä Einari Vuorelan runoihin
Rautavaara, E.: Sammon Ryosto (The Rape of the Sampo) (The Myth of Sampo) [Opera]
Sibelius, J.: Tempest (The) (Complete Version)
Det sjungande tradet, Op. 110 (The Singing Tree)
Sibelius, J.: Sibelius Festival (Helsinki Philharmonic)
Sibelius, J.: 10 Little Pieces / 2 Serenades / The Tempest / 7 Songs