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 0x5ec2567a75fbe2df5918c31c78dc1bff1443de6d614047eb7d78893eb5f396a3. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). 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
Chopin, F. / Rachmaninov, S.: Sonatas for Cello and Piano
Cello Sonata in G Minor, Op. 65: III. 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 0x1aaef5b6561661460811a5de6ae36880ae7e7664b926577dc7c1754079fc648b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/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 : Variation III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f33d25f3e3f09096ae116a2157d79e8967c7320b3690b9f4d9f566b2fe9e1e. 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/FIFIN9900121.
Martinu : Variations about a Slovakian Theme : Variation IV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e8f192b6b04b120bed2fc56368a69b03698588ffce8c6e229ee36621740212. 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/FIFIN9900122.
Martinu : Variations about a Slovakian Theme : Variation V
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b77d369f01dd743242b34d036bab080dc406155614878c8c07026b117a0d39. 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/FIFIN9900123.
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.
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
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.
Rautavaara: Symphony No. 6 / Cello Concerto
Gloria in D Major, RV 589: I. Gloria in excelsis Deo (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8787e92513b95813a20c0e1d2e8448316c30a737d73468cd5cb3e3f9b1ef13. 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/GBAYC9200663.
Orchestre de chambre Jean-François Paillard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1638f4b479cdc7557a231208a5dc076cfb64214bc4cc69099af195adfaf00c9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ206800200.
Zadok the Priest, HWV 258: Zadok the Priest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078de273d45912da0da6005826149da6cf50dceb60a5f482d2ee1db0b5e802cb. 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/GBAYC0102057.
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.
Concerto for 2 Mandolins in G Major, RV 532: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e7495d20a6513854de0eb39391eac041aa7c0a28a7633c3c5771251cb346a6. 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/GBAYC0103446.
Chamber Music (Finnish): Century of Finnish Chamber Music (A)
Sibelius, J.: Sibelius Edition, Vol. 2 - Chamber Music I
The Sibelius Edition, Vol. 8: Orchestral Works
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.
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 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 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.
Passio: Numquid et tu ex discipulis ejus es?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bae3f77c1bb9c47ec121902b98167e6dea7b8ac674e430effed8b79332c463. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SEAEC2112050.
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 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.
Kokkonen, J.: Cello Concerto / Symphonies Nos. 3 and 4 (Finnish Radio Symphony)
Finland 100: A Century of Finnish Classics
Einojuhani Rautavaara 90th Anniversary Edition
The Spanish Masters - A Complete Selection
Esteban Sanchez: Albeniz - Recuerdos de Viaje
Nordgren, P.H.: Symphony for Strings / Hate-Love / Transe-Choral