The Estonian National Symphony Orchestra ( []) (formerly known as the Symphony Orchestra of the Estonian Radio Committee, Estonian Radio Symphony Orchestra, and the Estonian SSR State Symphony Orche
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 0x6112e27f396a668ef747378e46a9b5592e73d123e0d278b79b53652aec5e46b2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f92a225-fd7e-48f8-8f58-ffbd9e5f1c5b.json and https://artists.proofprofile.net/proofs/artist/2f92a225-fd7e-48f8-8f58-ffbd9e5f1c5b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Neeme Järvi in concert: Mozart, Wagner, Brahms & Reger
Ave Verum Corpus, K. 618: Ave verum corpus, K. 618
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 0xbd8e9eb18502b9a2c0b282461b627b2b529dc1b8bd5782d1d3c5342b38977ac6. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/GBLWD2300209 — a six-check JSON result.
Pärt: Symphony No. 1, Op. 9 "Polyphonic": I. Canons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1ea132f61643a1154f1f4307afd9caf8ddc3c0689e34f99a4de32e86e5d9a5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC0302898 — a six-check JSON result.
Pärt: Fratres (1991 Version for String Orchestra and Percussion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902072c8e6e913c2b9c3614fabefcaf1b5a3373039467731cd66a51e1154d14. 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/GBAYC0003349 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3080f8af807f20571f2170d4d5f6b69efc7b7866d82a003254a1957a1a082eb8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0003350 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177. 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/GBAYD9300290 — a six-check JSON result.
In Principio: I. In Principio Erat Verbum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234148aa608c8c16c69d75ad674e26bdb11ca2a3f4efb428c21e5fb827e2eb4b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEB330805001 — a six-check JSON result.
In Principio: II. Fuit Homo Missus A Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08919ca6282507c3a5554b71671be38636e98beff89cab4f56493611db100187. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEB330805002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a28e3b12047066b950470e805556c38223bf8870ea0f161c7f481b897eea0c7. 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/DEB330805003 — a six-check JSON result.
In Principio: IV. Quotquot Autem Acceperunt Sum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f17706776e01d3c9c1f0f43c9c994ae11435f819e3cf12ef8e39204a48545e3. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEB330805004 — a six-check JSON result.
In Principio: V. Et Verbum Caro Factum Est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0a1ee10b82403f9052efb867eb560d16c454553171b8f5c01df18b69cf0b6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEB330805005 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb13d5b2cac6aa37efbfd6bf5ab64ee8d6ad99e1c8e38df659436721f77b4ca. 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/DEB330805006 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80bb86bd5f441fa61c98b13fce1783006bcb646ef05ce9102b04c658fa26300. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330805007 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb9263ba9f81f18d277da2f6107faa8188f805cd93735ef72c9903c2bc70322. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB330805008 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd8de384b8cf126f83291acb9d9b6969057edcada4f0260fc5873113e5d5b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330805009 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fb7ac57c1df1376bb9752dd912239274b499b3f0f8576ff50ffb2f83be6982. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB330805010 — a six-check JSON result.
Mozart: Piano Concerto No. 22 in E-Flat Major, K. 482 - Strauss: Le bourgeois gentilhomme, Op. 60, TrV 228c (Live)
Grieg: Peer Gynt, Op. 23, Act 5: No. 21, Prelude. Peer Gynt's Homecoming
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1516740ea294aa6740e6ac1097214849a9c31b06428d45a7d74213928e429e5. 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/GBAYC0402245 — a six-check JSON result.
Pärt: Cantus in memoriam Benjamin Britten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef349a22d077def251a19cb8139fe299fcbfc8c0d819ffcd73c725e05831958. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0003352 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce1632591311f674fc65a62ecfbb15fa88a87ac7438305e34d43af2e0b97d99. 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/GBAYC0203620 — a six-check JSON result.
Klassische Musik für den Sommer - Über das Meer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1516740ea294aa6740e6ac1097214849a9c31b06428d45a7d74213928e429e5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAYC0402245 — a six-check JSON result.
Sibelius: Pelléas et Mélisande, Op. 46: III. At the Seashore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695ad6d62e139f41e4624b1b7db54c5b373fcf22bd43b000a65bbbd6190b5f63. 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/GBAYC0102413 — a six-check JSON result.
Peer Gynt, Op. 23. Act III: No. 14, The Death of Åse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe274606963899ce72b9737d3ece2be6454d30290d39cba203688ff94b19a9c08. 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/GBAYC0402238 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafe3fcff593995131ed24eccda2d0e693a6b68d0989752a7b03a8adb34a8a61. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBAYC0003343 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc902072c8e6e913c2b9c3614fabefcaf1b5a3373039467731cd66a51e1154d14. 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/GBAYC0003349 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef349a22d077def251a19cb8139fe299fcbfc8c0d819ffcd73c725e05831958. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0003352 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd114db3d4802a04a9d9ac992e77485ed20b92719e2a6f2e51d34d4b14396dd. 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/FIABA0600011 — a six-check JSON result.