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 0x4e92202a38d3f67ef3af123554319f7493212159f19adfcf58de3b364d61550e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78449921-dbb9-4316-9bfc-8877907c4ceb.json and https://artists.proofprofile.net/proofs/artist/78449921-dbb9-4316-9bfc-8877907c4ceb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chamber Music (18Th Century) - Bach, C.P.E. / Schaffrath, C. / Zarth, G. / Graun, J.G.
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 0x3147450506ed55b0777b9bfd3327d4f0a06cc05d772c7bf67dfe2a48955e891c. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:56:27Z), 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/US2TL0905616.
Chamber Music (Baroque) - Frederick Iii / Schaffrath, C. / Bach, C.P.E. / Benda, F. / Janitsch, J.G. (Music From Sanssouci)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a8b31746587690d6697affef0180aa9edeccdf066c0e5f88bcdab5c061fdde. 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/USB8U1011303.
Flute Sonata in E Minor: II. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91cf7d805cbacfcf7a53a326016586c9236ac2c5d6873dde910731ed39f95c2. 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/USB8U1011304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca96016fbfc1ef8c08989c46386d9cc622640ac2719005e7be1f2e4012814b0. 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/USB8U1011305.
Duetto in D Minor, Op. 1: I. Poco allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4706e0e3b998c061afd4ea075a3980cdcf2e2f36e35074150126eb28155686ed. 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/USB8U1011306.
Viola da Gamba Sonata in C Major, Wq. 136, H. 558: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387defcd8c86c145a0a711821135c837f14ba25a77eecc1f8855c500a786b094. 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/USB8U1011313.
Violin Sonata in E-flat Major: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ca58f288b38a918aff60d595496396fcd01edf9b650802ce78503aceb9aacb. 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/USB8U1011317.
Quartet in G Major: II. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494b52a180b063dd2c5245197d7db012508110b14782b257adc00770daadba08. 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/USB8U1011319.
Viola da Gamba Sonata in C Major, Wq. 136, H. 558: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162e9dab1c442484574cfbb2ae105678e7ab4973a338c36a977bea7f09b79a1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USB8U1011312.
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
Viola da Gamba Sonata in C Major, Wq. 136, H. 558: III. Arioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c352b44e7d88d80f40a450cfc14d2c5fc2ead5fdff898aeac70be1aeb1a840c. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/USB8U1011314.
Violin Sonata in E-flat Major: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515ce2f239ecad41caa9bd2b91ec6e360a476aff97d9c26ffddbecbdd3a77fbf. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USB8U1011315.
Violin Sonata in E-flat Major: II. Adagio moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a429c2b557ae095394e92685d37c467fae8e40c20c8fca75c6fbcc3b1115c4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USB8U1011316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be1e70f84dca74712e8cb98561a629c2f6948888b698ad1c71d52557571bff6. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USB8U1011318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa577a4918b68d034db721de7c6d7389a88a6988aba739f00fbebe44d45ae31e8. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USB8U1011320.
Chamber Music (17Th-18Th Centuries) - Fischer, J. / Telemann, G.P. / Fux, J.J. / Marais, M. / Schmelzer, J.H.
Musik im Bachhaus - Historische Streichinstrumente
Trumpet Sonata in D Major, Z. 850: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3512faed4d43e4b358a3c63e10d23c065b68fac148e19d1b0f0d2b2b14a8ef. 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/DEB261801022.
Trumpet Sonata in D Major, Z. 850: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee6f0df9e3c9e7cd4e781c5a5a038acd3d3ac1d0a96ef630d8d6c96277e0897. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEB261801021.