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 0x013400055cb2ea1298b8f971ab42d7928484bc281b3152135ea2764a383b586e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/600aa35a-72c2-4d47-90ab-987ee93f5817.json and https://artists.proofprofile.net/proofs/artist/600aa35a-72c2-4d47-90ab-987ee93f5817.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2003 Texas Music Educators Association (TMEA): All-State Mixed Chorus, All-State Men's Chorus & All-State Women's Chorus [Live]
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 0x0be528ec14940e278829c185a513352b04b86b1c22b2ae443fc2d3371bc5e294. 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/USVZX1315702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5784ec046a7fc09d1e712dde8cb555f1f5c62d0a01bb817b58b20807f1817884. 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/USVZX1315708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753bce5cb7fdcfb58702a1ed5e8655a0bb2a65b58c753280ba3723298f273159. 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/USVZX1315722.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAET1030270.
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 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/FINDE9800127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25d5ac677e0060b89186d784fc63eba643207ffc6bd39dc4ee3169645d1b919. 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/FINDE9800130.
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEJ9898400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae7d0dca83a8f66731ee91e98c4f57599c0e1f2a76f5339476c42bfa29779c9. 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/FICMF2200004.
Voisinpa Jeesuksestani (Could I but sing of Jesus) (arr. J. Tormala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb27ed4ab773a73fb052ab3829427d97d8e902069f8c1eb142e2a635c82ed919. 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/FIABA1200181.
Nouskaamme vuorelle korkeimmalle (Let us rise to the highest hill) (arr. O. Heikkila and T. Nikkola)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d391da6073550011df7523f3e4e6544e590de19131884f1bd087169f78ed39f. 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/FIABA1200183.
Anna meille rauhasi (Give us Thy peace) (arr. T. Nikkola)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdb15039a2de6f69489cc4c3f6a4dd33bc474cab8db1612133f608cc7704958. 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/FIABA1200184.
Jo joutui armas aika (This blessed time is come again) (arr. O. Heikkila)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e30e3317d944fb3d272b5a49363981ce1e33667774852d4d188a759ad95488d. 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/FIABA1200191.
Ma silmat luon ylos taivaaseen (I cast my eyes to heaven) (arr. J. Haapasalo and M. Turunen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0153b1f7a9f8c5bddb478bc59f62476c7f58f1ee4af380e1b30225af4b7f50. 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/FIABA1200194.
Ystava sa lapsien (Thou friend of children) (arr. T. Nikkola)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93b45e398929556bfde52007a1eef10a7dea434f5fb679f8bd872075f299724. 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/FIABA1200195.
Totuuden Henki (Spirit of truth) [Finnish Lutheran Hymnbook 484] (arr. K.-E. Gustafsson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a536892ade7fc5a5a24259364858471139b331dfd7a4faf174ac8d9e1e274c0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FIABA1200179.
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
Jo varhain, Herra annoit (Long ago, Lord, Thou gavest) (arr. K.-E. Gustafsson and J. Tormala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aefc23f741de23b7d76342071772e6dcd4f80e77e6011049e58ab9ac39fb58e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FIABA1200187.
Carolinae Female Choir & Ulrika Emanuelsson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987f0f09127aed196e7a29b4cf8ed56f0111b3ecfcf73206e7b28d23efe8ae6e. 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/SE3S40900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2647e0bc549a1d668f72c9b22c85b7b732dd64d98a6dc07cfd3f17a587dd9d. 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/FIFGL0200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05190c6ab4e825077807466a14dfdc019073d8e2c5b2d0d173c98f7761bcd3c3. 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/QM4TW1970938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd880e197cc0a2c37d9e1864b55b348c872e4076f0991dbc887918c7f2244dda9. 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/QM4TW1970943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6baa69cf9f6bdf9b84cca60a4edd613b0e6ded8aa4aabb76909bee16ac5bfbf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TW1970947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68e6e2fdb882c8cb6b13a663a39291bd3fe3abd9a4ee034ce8191b10cfede98. 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/QM4TW1970948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1518bddee4f2c6720d51b2456475762f0557a60710697a2933a8325f097c3a12. 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/QM4TW1970954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9acdb743948217ba3970bfb769d8af341de0bcb7eae681d8e9382e61acccfe. 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/USR9N1627909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8e0700237dd9f02e89ed125806359bef438dd256e0159c765c90bd1d5cb8b7. 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/USDY42198236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24a53fb1f9cb9c9c2ae85430ad56efd4ccda309fb42b7d2bebff381711988b4. 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/USDY42198237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97453d41314f4a02d4b617d2eddaad11c66f6f79d3bdb6c445176bca695d514. 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/USDY42198245.
Kauppakorkeakoulun Ylioppilaskunnan Laulajat - Helsinki Academic Male Choir KYL
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d5af44b36a056140425dc69a33102c3b40369b1e7e388bc9f6e7ffa0db25ad. 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/FIKYC0800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f41bdc8e13bbc0c970bee188e82fdf6c93e5cbab24d26bd2dee3ee14995280. 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/USB8U1076281.
Minnena ser mig- Gustaf Sjökvists kammarkör sjunger Tomas Tranströmer
Soiva L. Onerva II (Konserttitaltiointi Sibelius-Akatemian konserttisalissa 4.9.2007)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6d6b94c2ebdba4318c3805d7db57bde003f9e17a4a7e62625a3fecc044f31a. 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/FIPEA2400015.