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 0xc1a288fe6201c584fc52f9e6ea69040b7a3f79d7d1648388bc4628de91492268. 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/6f0abfac-c3c2-415d-95f3-516e9eaf6c64.json and https://artists.proofprofile.net/proofs/artist/6f0abfac-c3c2-415d-95f3-516e9eaf6c64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Andante sostenuto pour Hautbois et Harpe
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 0xc2189ddb3b081e38b44454704600e18a16b9bdb8798b0e243d51da5b6c534d7c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ141308010.
"Omagio a Bellini" pour Cor Anglais et Harpe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b43d6ed64c962575274ba3f9d457cd4bd89b0fff770e833535ebcfbe7ba8bf. 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/FRZ141308020.
Andante d'après l'opéra Die Zauberharfe, D. 644
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4cc68a075622aac2822d30e907ae8042415961d0588cc4533ec745c80a2a2d. 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/FRZ141308030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e8e87f714b872a40fe9b36752eca0f2a42248f61fa1fe53bac7360235eba11. 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/FRZ141308040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a53aa4f9f76cf7e3c1e15d62ce1ec720633e9212dedb94fbac80ac47ff44e1. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRZ141308050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab9121422139887f929bfee455b80324e2265fb77e674716fa0d8d83725bab2. 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/FRZ141308070.
Mélodie du berger pour Cor Anglais seul (d'après "Tristan und Isolde", Acte 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa8d8600c5557ce92220fa1b91429964c38c2d27c2eaa3ad7f3f4f7407a3ee2. 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/FRZ141308090.
"O du mein holder Abendstern" (d'après "Tannhäuser", Acte 3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8581597f0ab8cd05f13ea1101e541ac003cee2da7678a3b7abe6d0fbde175f. 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/FRZ141308100.
Sonata for Oboe and Piano in D Major, Op. 166: I. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456952eec18a8801baeab86ac3a99f4016218b8e8bed4019b009f7b650c19eee. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DES382216014.
Concerto in D Minor, BWV 1059: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f68196ece30c3fef37279236d790aaeb27e61363d1eaa1865121867dce67b1e. 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/DES381919001.
Concerto in D Minor, BWV 1059: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52730b5abad12bd1bfe5b2eaf6d6235fc24dc8250448aafbe8763cf829e993a1. 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/DES381919002.
Concerto in D Minor, BWV 1059: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60af207f9fb939e28a49980515b963d006af9eda0ccdf34e538ce6c13dacd572. 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/DES381919003.
Cantata "Weinen, Klagen, Sorgen, Zagen", BWV 12: Sinfonia. Adagio assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebda6feb40235d1c7bf7fbc49ee42e1d0d001960e53908972b428f864db9ba1. 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/DES381919004.
Concerto in D Minor: I. Andante e spiccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb1b29cd334ffddfbeb50fc155c7bce16296c748fd439b0dc826e6ea64f6b82. 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/DES381919005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6a5edcea9ba40d55166a96c439cae83f47a82e6f6d755ac7a5a3f4d154ea76. 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/DES381919006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9803751f9217891563e1d3ca595f7e8246c7ae67f0232d8063f67b3fd973d9f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DES381919007.
Cantata "Ich hatte viel Bekümmernis", BWV 21: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec268dba62957fa57af778c2bba7fe8b51bbb51e45bdaa0f80af29411d74660a. 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/DES381919008.
Concerto in F Major, BWV 1053R: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0d2753328d32454ad8a50c3a7f111f8518d53b883d5c99f4db2d860e5dfa1e. 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/DES381919009.
Concerto in F Major, BWV 1053R: II. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa05cd844279ba72e95f5355f62819d636cbcf83743dd6f81e480ede42e5898f. 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/DES381919010.
Concerto in F Major, BWV 1053R: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a9419c4dbb3982eea2037cef4045542df3fc8b002488bf90660b010478f1dc. 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/DES381919011.
Concerto in A Major, BWV 1055: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e8328b67dfc19fb73aca0dda443e1601d4a579a4721665301b190247628dc6. 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/DES381919012.
Concerto in A Major, BWV 1055: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb58cc340252a0ccc9acd659647d34e2399b60bd112acb889d74ba9a2312c938. 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/DES381919013.
Concerto in A Major, BWV 1055: III. Allegro ma non tanto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2bd799ce5ff423b4583efd57431bb54cd7a3d229c22904e6d7ece5c1a87aeb. 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/DES381919014.