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 0xc77180560b9ce9508954bd936e47e0c146208284992533d6a93d400aef8149e1. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7f3b2ec-71e8-47e4-8ecd-22675fa191cf.json and https://artists.proofprofile.net/proofs/artist/d7f3b2ec-71e8-47e4-8ecd-22675fa191cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oboe Sonata: II. Sehr langsam - Lebhaft - Sehr langsam - Wieder lebhaft
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 0x2fc12877253e35fffd3066542389209cbe63028c0440c2939a3c2ecc6668d1f8. 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/SEAEV1423020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabfd9cab3ab551698dad4cd0a0cd96458c9bac43e902a8cd47505b4d8f1c7b0. 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/SEAEV1423140.
Oboe Suite, Op. 17: II. Con fuoco - Con moto e poco largamente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9b6ff4848b43175a6601496390142388cc06b6dfd55e79e3dcae38543dc726. 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/SEAEV1423150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f0a5779dddde1e4dfd270db73b9cda8bd2ffd7773412f2eea4ee85ddbd3667. 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/SEAEV1423160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa669eafc754d613873c1d8703f4e68dd70c8b27647a13d838760262cd7831042. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEAEV1423010.
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 0x175f8a1a885853295efca1d467caa0a17a0534d43f0ac7482be677896b39caf6. 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/FRZ140302010.
Drei Romanzen, Op. 94: II. Einfach, innig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb437322dc8ea2fcb5a39edb9068077a706aeafd57f3e9d137c9646bd77d6a1. 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/FRZ140302020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9777f4cb13eb0b06e13683ffdf0f9890f7b81bb4422802f46ce92ce019ab49b1. 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/FRZ140302040.
Fünf Stücke im Volkston, Op.102: II. Langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6939a54c93a1b0ffcc148e94b1e29311522a3a891cd9ce2f88ba6ec3f6aa2d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRZ140302060.
Fünf Stücke im Volkston, Op.102: IV. Nicht zu rasch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc09a541b763f2ff55f4f97b9784fad1eb8bcb45f44a15fa048270c9afb600a0. 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/FRZ140302080.
Fantasiestücke, Op. 73: I. Zart und mit ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9166c878d3ab7e4b039de160accaeac6fe6666ae29d00de1f88eb1ce022ebf. 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/FRZ140302090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa574eeb808d1e2bc04fcec977d5f5e8723fba8c5f7d3592a71a24a96a3f93877. 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/FRZ140302120.
Drei Romanzen, Op. 21: III. Leidenschaftlich cchnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba280b2e52f86534ea2e633a50fe7cb3ccd795aeda058f097526b8222d814ab. 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/FRZ140302140.
Drei Romanzen, Op. 94: III. Nicht schnell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7abd363052a52d54308c16275cc9a97717b8a0f75d6bc667f57ce8d3280e20. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140302030.
Adagio und Allegro, Op. 70: II. Rasch und feurig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c497ad8a119aa26f9f4b84025ff5604dcd61e6682a4c90663f72cb5a684da57. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ140302050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd36ca7685e88fde4f8edf8f8762019cd04cda81d40f1046f726dcd1f4183c0. 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/FRZ140302130.
Mozart: Oboe Concerto - Oboe Quartet - Sonata
Oboe Quartet in F Major, K. 370: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0333b9c614684042ea62a3019d18b6abea4376d966bb18fc673007ae82fe8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEAEV1307010.
Oboe Quartet in F Major, K. 370: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfa8a117d46c2b2a5fcdd08c75fd88630598c72c39cca389807e7c9bacc21d6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEAEV1307020.
Oboe Quartet in F Major, K. 370: III. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b35b03d76bfb8a69be6aaec8c76026d5150cd0de6409db2a64f386770c3f9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV1307030.
Oboe Concerto in C Major, K. 271k/K. 314: I. Allegro aperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f86df9a6a59bb1793f9eebaaf7bd8c523015bebed996ef89798f4c945948c05. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV1307040.
Oboe Concerto in C Major, K. 271k / K. 314: II. Andante ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71051d322860811baf3d1d75ac315ec2d50b8e23a4e57a8c66fbe949dbd07c9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEV1307050.
Oboe Concerto in C Major, K. 271k / K. 314: III. Rondo. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acc6e9486d300750dc01bc4affdd194c6661dfa35205a75c9baf06ca429405b. 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/SEAEV1307060.
Violin Sonata No. 26 in B-Flat Major, K. 378: I. Allegro moderato (Arr. L. Slavinsky for oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd669887bf897595394a43db8ffdb424d23da0cdf373a7bf0fd96b62e87459e5. 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/SEAEV1307070.
Violin Sonata No. 26 in B-Flat Major, K. 378: II. Andantino sostenuto e cantabile (Arr. L. Slavinsky for oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408d7bb5c30c57b1e27295c21b833192d15071196d8a04de37f448ae0fc49a2a. 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/SEAEV1307080.
Violin Sonata No. 26 in B-Flat Major, K. 378: III. Rondo. Allegro (Arr. L. Slavinsky for oboe and piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdc5bea42ff9dc313cb345b2c9d0392b777ed84d7e3d3b6e240832ea7f8b856. 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/SEAEV1307090.
Geneva Music Competition: 75 Years of Musical Discoveries (Live Recording)