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 0x1142e851ca310c9c14b42418f17823fe83116bf50982916edc73d3ad3bf8c384. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f99bb506-f76f-4ccb-b3ae-15c7d0cbd216.json and https://artists.proofprofile.net/proofs/artist/f99bb506-f76f-4ccb-b3ae-15c7d0cbd216.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rietz, Bruch & Weber: The Romantic Clarinet
Concerto for Clarinet and Orchestra in G Minor, Op. 29: I. Allegro agitato
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 0x8622893ad2e1d8452a750964f42616d232ffe2be8d92307dee695abb2ea5e037. 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/DES380002077.
Concerto for Clarinet and Orchestra in G Minor, Op. 29: III. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661db5827e720b89254a43238ba983e774f93c8a71c9c678ecfb950119f1707. 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/DES380002079.
Concerto for Clarinet, Viola and Orchestra in E Minor, Op. 88: I. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ef1e63b5c0480b2e4f90d66cb52077cb80af994bc9166b787f4ccf9d7e24c4. 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/DES380002080.
Concerto for Clarinet, Viola and Orchestra in E Minor, Op. 88: II. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69fce885fc8e1aa80d606045faa843a6dfda647de7bf10543f673c3d552a717. 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/DES380002081.
Concerto for Clarinet, Viola and Orchestra in E Minor, Op. 88: III. Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6003a25e5c459da3875f190358943e8d8e30bf438a3486438553de2dac7b3a. 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/DES380002082.
Quintet for Clarinet and String Quartet in B-Flat Major, Op. 34: II. Fantasia. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41eecb5da3f63b54f3449cfcca9b976c66156bb617ad9eb61bc82292fddc5633. 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/DES380002084.
Felix Mendelssohn & George Enescu: Octets for Strings (Live)
Octet in E-Flat Major, Op. 20, MWV R20: I. Allegro moderato, ma con fuoco - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ead9a0491dd8f890841ebb97db39587a033938c803c476f3b96a67c1cccec6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEAQ70900183.
Octet in E-Flat Major, Op. 20, MWV R20: II. Andante - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f55fb7680b52f76e30097069f2770d38b56ce450d150b4d5f1abe75468ebaac. 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/DEAQ70900184.
Octet in E-Flat Major, Op. 20, MWV R20: IV. Presto - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7d6c4d9cd0601c84d199150f438b242e8f2df2f8c4668104a80b30b2519169. 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/DEAQ70900186.
Octet in C Major, Op. 7: I. Très modéré - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc026432b5b07fce454c954b365b4f69c8a57dec49bc7c7fe2b6fc37c92607560. 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/DEAQ70900187.
Octet in C Major, Op. 7: II. Très fougueux - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa614b278850991b26ebc4aff995d013fd61229f80677d064ed9cd757f181121e. 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/DEAQ70900188.
Octet in C Major, Op. 7: III. Lentement - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dda539a2444703440e064bdf5b3e18d287219ac09177d4663b0fb5636d1470d. 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/DEAQ70900189.
Octet in C Major, Op. 7: IV. Mouvement de valse bien rythmée - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5cbfe33c76b138596ce7015d1399c162721e8450c3c69f49bb226ef82e949c. 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/DEAQ70900190.
Octet in E-Flat Major, Op. 20, MWV R20: III. Scherzo (Allegro leggierissimo) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94d4f731d5343db3c4fe989fad07ce3029bce7bf24c23a98b3f19a6a2746253. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ70900185.
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
Italian Postcards: Wolf – Mozart – Borenstein – Tchaikovsky
Fantasia No. 1 in B-Flat Major, TWV 40:14: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3193b4fcaa84ebbd12d79a3f9dabe50e0d8faab2e8406eb471b59ffec34439c5. 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/DES380020535.
Fantasia No. 1 in B-Flat Major, TWV 40:14: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa8d3b18dad65a8299c5b7c18361619d74b64eb325ff1df4989a0758b1c9203. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380020536.
Fantasia No. 1 in B-Flat Major, TWV 40:14: III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3faedcb6b74987300e3b1cd33663c5192153ad82b34c9e43b99b7bea55049a80. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380020537.
Fantasia No. 2 in G Major, TWV 40:15: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527a4b72efdfaebbc8a0aaf9f1acdb414ef8d35473bfbff966a747696b21b156. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380020539.
Fantasia No. 7 in E-Flat Major, TWV 40:20: I. Dolce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5178fa6c984c926b3535626bdb5f0053c9084ad915e1e2766ca4ac80f8113bc. 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/DES380020556.