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 0x9f2ed747a3fd5f9dd8010cc1061bad8c0a78c6b011bb029c1e29417376a4d011. 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/cf050dde-de0b-4905-b672-7b8b0d58168b.json and https://artists.proofprofile.net/proofs/artist/cf050dde-de0b-4905-b672-7b8b0d58168b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Siri (feat. Jthyago, Anthony, Jhaylar, La Cuestion, Siskuflow & Brahms)
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 0x2d92e75cc013c5f5093e8ba97c563a6b1b649c8aa49065ba4c1bffd5fe2927bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2313470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e362f805286aff5e57913c5cf0c5efcebb745e885f2ad73a633f6c10dc8192. 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/ESA011657542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23c189497316bff10b48c7dc7a5efcd4edd67083557cd20c29fc577a40a9bbf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ESA092210422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c419fbd24412337d4749c052fe24f930d76efe72b67e007a6b038fd945e293. 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/ESA092236202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e21fe5d339ca2ba9f87180dbf8a6af57c02e5f2d4cf602cc6a9db6f80144cd. 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/ESA012287465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd461dbf1c1070e35a35f0eafecc60ed8274dcc97905515bc6ee1b50f9e6a18. 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/ESA012210143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ddad99b53e3b0ba06e579925f2a2d411112977caea7f92125c899e8695947b. 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/ESA011560333.
21 Hungarian Dances, Wooi - No. 2 In D Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13ac5ea64fa207e2f47e7ca071f97b7898598534f7b614a3ba3e23b24bd8fff. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USX760600099.
Violin Sonata No. 3 In D Minor, Op. 108 - III - Un Poco Presto E Con Sentimento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0570571b4eb9723e1b176621c1063e2fe8d62ffa9e0f9bedceeadc1e4cbcd0f7. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USX760600096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72db8229096c9b64f80ca4dfc1619a4b372ec351ab900aac4aa90b73009c5692. 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/ESA092409087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099e61904a2f75664a0a1920d2d5f4d6977284f55bac70e7955cb34c55c7dddd. 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/QM7282318037.
BRAHMS Piano Concerto No. 2 in B-Flat Major, Op. 83, IJB 83: I. Allegro non troppo
BRAHMS: PIANO CONCERTO No. 2 (REHEARSAL)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390fc35f4b674f30a0501ea583013332499258f226fd81814239db7b5ce774ef. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBKQU2230118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda2c4d09ac2ac24014792660313dfc6dd61409e636105ff052dbf09c87ebcff. 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/PHI012208067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a2a0206e3ef65dd18546b08578e8fc8596f5d071f09c8a8906f2c0c45fa1fb. 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/PHI012208073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee1ff365d47a6b4086b0bea75e74e7233597c954b9524dee2c5e914469990db. 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/QZN882442534.