thumb|Satu Vänskä, 2018 Satu Vänskä (born 1979) is a Finnish Australian violinist. Early life Vänskä was born to a Finnish family in the Kinki region of Japan, where she took her first violin lessons
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 0x9e3e4bf2058cd85b190a76ec34796a179b4e9d6bd6f83b76f225f4d4b128041c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddba034b-6b34-4694-b237-9ce9637d045c.json and https://artists.proofprofile.net/proofs/artist/ddba034b-6b34-4694-b237-9ce9637d045c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
River (Original Motion Picture Soundtrack)
Violin Concerto in D Major, RV232: II. Largo
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 0xd644f860c32e7075b4b90a7adbe7ea5b5dcf303034e9493ee5640c7fba99cff8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/AUAB02150177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440cb5654ee0ccc07f40274253080732e2a8c944f8229959bbdca7a26db37809. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUAB02150180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1479a8aabd81b78e9a0a650654a07d0f0fc14678498a9546c35f40116d732f0. 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/AUAB02150181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86abd040c24d82165555f40ec668b3406aa261a40c6392adcbf96d2f852f4569. 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/AUAB02150182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5364fe6af78bdd193dbf52eb638b041401385b1fae1af0a24468712b8d2140a4. 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/AUAB02150184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db21d97e3d478910416ce0ca2b8d986ae2bc756f8d3f4abec6cbf61e817d5b7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/AUAB02150186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696e8b9e9d99d615560040966f8624bafa165edb743eb7679e93babe07115f4a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:19:42Z), 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/AUAB02150191.
String Quartet in F Major, M. 35: II. Assez vif - Très rythmé (Excerpt) [Arr. Richard Tognetti]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409bacc9b1fadcbce7901d7ebb3685edb2352f3d119d74d54d9f6fdb30686b3b. 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/AUAB02150193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117e2ef776aa02fcb2068a937a5b9f1718158aac35d7f94fa6f7ebb7818db45b. 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/AUAB02150194.
Concerto Grosso in G Minor, Op. 3 No. 2, RV 578: I. Adagio e spicato - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fd191f6fd46c97ba959ea712480e3ab2327fd0309c203613d332738f4756b6. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB02150187.
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
The Four Seasons, Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": II. Adagio - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9337f3996393c663be863aa19fdcfdb538e1bbdfdbaa6d434a840e81baf10ade. 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/SEAEW1403050.
The Four Seasons, Concerto in F Major, Op. 8 No. 3, RV 293 "Autumn": II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb02774c942091dbebf2266dc9482c37918aef8c31d9f0ef63ea3efb930618ac. 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/SEAEW1403080.
The Four Seasons, Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f7fc08bbc4a4267d2b2274881f4962b340b0d5fdfc3c75e21f2e313237aa66. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-21T17:28:17Z), 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/SEAEW1403100.
The Four Seasons, Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6905dfc319ca793b22bd541588febe5e912c9a94433c8aa3ceb80b1767c4d023. 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/SEAEW1403110.
Violin Concerto in D Major, RV 226: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb3ae71d8a7cd721b5583e3460579ffaa4123bd326a011cbb5c2ec6bda2da7f. 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/SEAEW1403130.
Concerto for 4 Violins & Cello in B Minor, Op. 3 No. 10, RV 580: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954fb63e7b6563bb9a46408bf51f2aafe06fa95962e2f6157c68ec46ab3c6533. 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/SEAEW1403150.
Violin Concerto in A Minor, Op. 3 No. 6, RV 356: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eb269b2e645f27307f808344340c71803c7eee93e12ee8e998744e40f32e29. 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/SEAEW1403190.
Concerto grosso in D Major, RV 562 "Per la solennità di San Lorenzo": II. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85f43832012a0b26923353cbf136f96fd7b0a51f694ba8533595af2ba1873eb. 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/SEAEW1403200.
Concerto for 4 Violins & Cello in B Minor, Op. 3 No. 10, RV 580: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75058472e7edd869b9506f737a2081d4e76740296394e8b73177fbae416d4a2c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEW1403140.
Concerto for 4 Violins & Cello in B Minor, Op. 3 No. 10, RV 580: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd186a544d8bcf73c6c70579522891a4bf60ba7c049dc3cd99b940858b425f81c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SEAEW1403160.
Sibelius, J.: Sibelius Edition, Vol. 2 - Chamber Music I