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 0x5ec2567a75fbe2df5918c31c78dc1bff1443de6d614047eb7d78893eb5f396a3. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17ec0fce-2cbb-4976-8779-e2f808e5c159.json and https://artists.proofprofile.net/proofs/artist/17ec0fce-2cbb-4976-8779-e2f808e5c159.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sibelius: Lemminkainen in Tuonela (1896 Version) / 3 Pieces / in Memoriam
Nordgren: Rock Score / Cello Concerto No. 1 / Transe-Choral
Pēteris Vasks: Cello Concerto No. 2 "Klātbūtne" & Viola Concerto
Cello Concerto No. 2 "Klātbūtne": I. Cadenza - Andante cantabile
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 0xfa60209fd11e8eb383c987f745902e41daf520d9dedae43de52c1d8241b0ac6c. 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/FIABA2000302.
Cello Concerto No. 2 "Klātbūtne": II. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0f7fa3616c5174574a3f70085fbfab923a16060792a7b32314f56e08cb1022. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIABA2000303.
Cello Concerto No. 2 "Klātbūtne": III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2a2595ffa60e363ad23bd72123643517260dcbbed827133775bb15f0e9619b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FIABA2000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bfff9b25c64af2ba0387d6dcdc9eb5000f1830dd4aade679b698164d363cdb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FIABA2000305.
Cello Suite No. 1 in G Major, BWV 1007: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdabb48cc83a6f1e89eaab070926d127fd1a6c19f2ad8da09285554a41e9a94. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FIABA1900145.
Cello Suite No. 1 in G Major, BWV 1007: II. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e670bcb75cbe480177516b133840cd0cc2202035c6927822f0f48e0317eaee7. 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/FIABA1900146.
Chopin, F. / Rachmaninov, S.: Sonatas for Cello and Piano
Cello Sonata in G Minor, Op. 65: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaef5b6561661460811a5de6ae36880ae7e7664b926577dc7c1754079fc648b. 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/FIABA0900551.
Vasks, P.: Symphony No. 3 - Cello Concerto
Kaipainen, J.: Horn Concerto / Cello Concerto No. 1
Shchedrin, R.K.: Cello Concerto / The Seagull Suite
Martinu : Variations about a Slovakian Theme : Introduction & Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b78cd94009cfbd8390ccbde3c60b733b7d4881adcf03ab1239804e9731c06e4. 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/FIFIN9900118.
Martinu : Variations about a Slovakian Theme : Variation II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101eefd00e326185f871918d10ba273c7293bf11d1ab7943a324d974b1a2a121. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FIFIN9900120.
Martinu : Variations about a Slovakian Theme : Variation III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f33d25f3e3f09096ae116a2157d79e8967c7320b3690b9f4d9f566b2fe9e1e. 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/FIFIN9900121.
Martinu : Variations about a Slovakian Theme : Variation IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e8f192b6b04b120bed2fc56368a69b03698588ffce8c6e229ee36621740212. 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/FIFIN9900122.
Martinu : Variations about a Slovakian Theme : Variation V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b77d369f01dd743242b34d036bab080dc406155614878c8c07026b117a0d39. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FIFIN9900123.
Rautavaara: Symphony No. 6 / Cello Concerto
Gloria in D Major, RV 589: I. Gloria in excelsis Deo (Chorus)
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Orchestre de chambre Jean-François Paillard
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Zadok the Priest, HWV 258: Zadok the Priest
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Cantata No. 51, BWV. 51: Aria, Jauchzet Gott in allen Landen!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fd2e23ebef579bed8bc596f6d0504419c5e33b25b76e919da11f05c51f30e. 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/GBAYC9301023.
Wir danken dir, Gott, wir danken dir, BWV 29: I. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fd8fb248c785ba1b5dc8d311457bd6fb4236ef7fd5476a974792fbdd8eaa00. 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/DEA807200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e7517fc35dee2be76ab3d890db22e46abcbdd16cb66c8f22e428d16a59c692. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBAYC9001774.
Flute Sonata in E-Flat Major, BWV 1031: II. Siciliano
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Concerto for 2 Mandolins in G Major, RV 532: I. Allegro
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Chamber Music (Finnish): Century of Finnish Chamber Music (A)
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Sibelius, J.: Sibelius Edition, Vol. 2 - Chamber Music I
The Sibelius Edition, Vol. 8: Orchestral Works
Passio: Passio Domini Nostri Jesu Christi
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee31aa91df0544f79192df0b79af20bad063a8785be6484fc787a89446ab8632. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SEAEC2112020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c3a93e4eabff09d973dc4f0f1a1afb573870db031c7ca5db803abbc55399e1. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/SEAEC2112030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef158ded73ee72a189c381bbe4207ff9b366801d5816caa98691aea857a72ddc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SEAEC2112040.
Passio: Numquid et tu ex discipulis ejus es?
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eafd1d8227b0a785c3fd7dca1e8ad5b21b72a8f864515759546be044ad01a9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEC2112060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb97b268e7a77978ac2f2818689f71e980b380cf6fe0d93f144f83f699078314. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SEAEC2112070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986e8477d79ed609732d10b63643ce5ee3c52c8f7d5eacba828e42aaa019603a. 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/SEAEC2112080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6719388e3d0c5fcbc7b23df76e53e9f66eb959102d5746740aba9b4ef437241. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/SEAEC2112090.
Passio: Postea sciens Jesus quia omnia consummata sunt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a19a1d74382d689377e2ead9b47edf70b86b31b1bec4d9f19014914d04cbe1. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/SEAEC2112100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb87c00be1374693b3272937427511aceca010bd2375299dd85c111ebd519315. 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/SEAEC2112110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fafd1e1a782c74532d61f7f469f5aa59e9c610c622024a7acb708cf1ef195d. 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/FIFIN9900168.
Kokkonen, J.: Cello Concerto / Symphonies Nos. 3 and 4 (Finnish Radio Symphony)
Cello Concerto: I. Moderato mosso - Allegro - Cadenza - Allegro vivace
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7182a46fedb9a7e9d0583ca572229cafee5c42f3cae2f1d38a948ab4d414c53. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FINDE0700083.
Finland 100: A Century of Finnish Classics
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Einojuhani Rautavaara 90th Anniversary Edition
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The Spanish Masters - A Complete Selection
Esteban Sanchez: Albeniz - Recuerdos de Viaje
Nordgren, P.H.: Symphony for Strings / Hate-Love / Transe-Choral