1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x1238eceac3e5c452a0689d89f538e90d28c65387b74d4b744f65a6432ee58abc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/338f6221-4aaf-460c-9061-8d8e698795b6.json and https://artists.proofprofile.net/proofs/artist/338f6221-4aaf-460c-9061-8d8e698795b6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Duett-Concertino for Clarinet, Bassoon and Strings, TrV 293, AV 147: I. Allegro moderato
Duett-Concertino for Clarinet, Bassoon and Strings, TrV 293, AV 147: II. Andante
Duett-Concertino for Clarinet, Bassoon and Strings, TrV 293, AV 147: III. Rondo. Allegro ma non troppo
Violin Concerto, TrV 110: II. Lento, ma non troppo
Violin Concerto, TrV 110: III. Rondo. Presto
{"copyright_id":"0x519f9e18acaca64a8b7fbe94c3ba9b557e9bd5215055fb990de1fdd66288c1c2","isrc":"GBLWD9805001","name":"Serenade for Strings: I. Barcarolle","registered_at":"2026-06-24T17:59:23Z","spotify_id":"2fTQfdxVpoBXCJprt7C7bM","type":"track"}
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519f9e18acaca64a8b7fbe94c3ba9b557e9bd5215055fb990de1fdd66288c1c2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2fTQfdxVpoBXCJprt7C7bM.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2fTQfdxVpoBXCJprt7C7bM.
{"copyright_id":"0xaffa863322100abe5e438f7d1933f30ea7c6439270ed2f3270d6a2c690603186","isrc":"GBLWD9805002","name":"Serenade for Strings: II. Romance","registered_at":"2026-06-18T17:47:50Z","spotify_id":"5ghVYWW7GgWHvLA9Oj8mjx","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffa863322100abe5e438f7d1933f30ea7c6439270ed2f3270d6a2c690603186. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5ghVYWW7GgWHvLA9Oj8mjx.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5ghVYWW7GgWHvLA9Oj8mjx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1527931cc4eea5c3c49b1f25cb7bbf15a6f777fa76de3f1206fe7c4b8347f3ab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/02WDoL9tPUPxDswbd8RJKG.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/02WDoL9tPUPxDswbd8RJKG.
Three Spring Miniatures: I. Gossamer (A Little Waltz)
Three Spring Miniatures: II. Willow Song (A Lament)
Three Spring Miniatures: III. Tree Tops (A Toccatina)
Shostakovich / Arr. Atovmyan: Suite from the Gadfly, Op. 97a: VIII. Romance
{"copyright_id":"0x613ec50e6159332306ed31c5c507b864357f6eb9a6ca70eb812b84dc6c1f5b82","isrc":"GBAYC9101134","name":"Shostakovich / Arr. Atovmyan: Suite from the Gadfly, Op. 97a: VIII. Romance","registered_at":"2026-06-04T04:38:54Z","spotify_id":"7c8EKQLv5ld1uWm1BdGqds","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613ec50e6159332306ed31c5c507b864357f6eb9a6ca70eb812b84dc6c1f5b82. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7c8EKQLv5ld1uWm1BdGqds.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7c8EKQLv5ld1uWm1BdGqds.
Fibich: Moods, Impressions and Souvenirs, Op. 41: No. 4, Poème (Arr. for Violin and Piano by Jan Kubelik)
{"copyright_id":"0xf188baa16b32d013af8bb225343e2378e8132754ce8c041d65c4634e27149c4a","isrc":"GBAYC9101122","name":"Fibich: Moods, Impressions and Souvenirs, Op. 41: No. 4, Poème (Arr. for Violin and Piano by Jan Kubelik)","registered_at":"2026-06-21T17:58:31Z","spotify_id":"6qbUSet6rXR1UUbXKYgKdU","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188baa16b32d013af8bb225343e2378e8132754ce8c041d65c4634e27149c4a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6qbUSet6rXR1UUbXKYgKdU.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6qbUSet6rXR1UUbXKYgKdU.
{"copyright_id":"0x908eaf6125cee02138b7535bdb453a3f37d73fb3f64f19c95c5670147e3f1efa","isrc":"GBAYC9400241","name":"Schindler's List - Theme","registered_at":"2026-06-04T12:03:54Z","spotify_id":"7fvbvzEZpcVcxsoyqGjBeY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908eaf6125cee02138b7535bdb453a3f37d73fb3f64f19c95c5670147e3f1efa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7fvbvzEZpcVcxsoyqGjBeY.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7fvbvzEZpcVcxsoyqGjBeY.
Vaughan Williams: The Lark Ascending (Excerpt)
{"copyright_id":"0xa0a4159f203e4ce141223358185eee2095b35653a900a2fc9bbbfddb65244aed","isrc":"DEA809100238","name":"Vaughan Williams: The Lark Ascending (Excerpt)","registered_at":"2026-06-06T16:37:06Z","spotify_id":"7CMBrdlbeEj7SdL9rDM495","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a4159f203e4ce141223358185eee2095b35653a900a2fc9bbbfddb65244aed. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7CMBrdlbeEj7SdL9rDM495.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7CMBrdlbeEj7SdL9rDM495.
{"copyright_id":"0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177","isrc":"GBAYD9300290","name":"Spiegel im Spiegel","registered_at":"2026-06-04T15:31:46Z","spotify_id":"5MDBJdIArlsT5dknF14VYq","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5MDBJdIArlsT5dknF14VYq.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5MDBJdIArlsT5dknF14VYq.
Shostakovich / Arr. Atovmyan: The Gadfly, Suite Op. 97a: No. 8 Romance
{"copyright_id":"0x364608020ecbb920a1f7dfe29ead2172d60ad1579d587a4426c923ca124ee02c","isrc":"GBAYD9100155","name":"Shostakovich / Arr. Atovmyan: The Gadfly, Suite Op. 97a: No. 8 Romance","registered_at":"2026-06-04T09:26:22Z","spotify_id":"1Uqi7EGfUE63UQ1USYv9IG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364608020ecbb920a1f7dfe29ead2172d60ad1579d587a4426c923ca124ee02c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1Uqi7EGfUE63UQ1USYv9IG.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1Uqi7EGfUE63UQ1USYv9IG.
Williams: Main Theme (From "Schindler's List")
{"copyright_id":"0x908eaf6125cee02138b7535bdb453a3f37d73fb3f64f19c95c5670147e3f1efa","isrc":"GBAYC9400241","name":"Williams: Main Theme (From \"Schindler's List\")","registered_at":"2026-06-04T12:03:54Z","spotify_id":"774YvCWhxkhYrmbQvhDS7Q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908eaf6125cee02138b7535bdb453a3f37d73fb3f64f19c95c5670147e3f1efa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/774YvCWhxkhYrmbQvhDS7Q.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/774YvCWhxkhYrmbQvhDS7Q.
{"copyright_id":"0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177","isrc":"GBAYD9300290","name":"Pärt: Spiegel im Spiegel","registered_at":"2026-06-04T15:31:46Z","spotify_id":"2SIxBgKmw7dDHedTpn8NxY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2SIxBgKmw7dDHedTpn8NxY.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2SIxBgKmw7dDHedTpn8NxY.
{"copyright_id":"0x908eaf6125cee02138b7535bdb453a3f37d73fb3f64f19c95c5670147e3f1efa","isrc":"GBAYC9400241","name":"Williams: Main Theme (From \"Schindler's List\")","registered_at":"2026-06-04T12:03:54Z","spotify_id":"2tsBabCOJJqcHSxrvDmVhV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908eaf6125cee02138b7535bdb453a3f37d73fb3f64f19c95c5670147e3f1efa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2tsBabCOJJqcHSxrvDmVhV.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2tsBabCOJJqcHSxrvDmVhV.
{"copyright_id":"0x4dcaf11dab5c7d0187fcb73499e97feeaceaa8e6308c568c74ac15286ea4108b","isrc":"GBAYD0300516","name":"Spiegel im Spiegel","registered_at":"2026-06-24T11:24:07Z","spotify_id":"0kVjEJ6DEn06n8DgWxwNQt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcaf11dab5c7d0187fcb73499e97feeaceaa8e6308c568c74ac15286ea4108b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0kVjEJ6DEn06n8DgWxwNQt.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/0kVjEJ6DEn06n8DgWxwNQt.
Klassik 100 Meisterwerke: Klassik die man gehört haben muss
{"copyright_id":"0x4dcaf11dab5c7d0187fcb73499e97feeaceaa8e6308c568c74ac15286ea4108b","isrc":"GBAYD0300516","name":"Spiegel im Spiegel","registered_at":"2026-06-24T11:24:07Z","spotify_id":"7y3p7yfPmwXjgCEfZVoJe8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcaf11dab5c7d0187fcb73499e97feeaceaa8e6308c568c74ac15286ea4108b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7y3p7yfPmwXjgCEfZVoJe8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7y3p7yfPmwXjgCEfZVoJe8.
{"copyright_id":"0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177","isrc":"GBAYD9300290","name":"Pärt: Spiegel im Spiegel","registered_at":"2026-06-04T15:31:46Z","spotify_id":"3br3V3EAnkBFz66tfbx3MG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3br3V3EAnkBFz66tfbx3MG.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3br3V3EAnkBFz66tfbx3MG.
The Most Peaceful Classical Album in the World...Ever!
Pärt: Fratres (1980 Version for Violin and Piano)
{"copyright_id":"0x06e0a004dbf16fce874fe34fb94d69c06ea294adc1f39538a2c69502eb4bd8d6","isrc":"GBAYD9300287","name":"Pärt: Fratres (1980 Version for Violin and Piano)","registered_at":"2026-06-10T03:08:16Z","spotify_id":"576bTOM9sJdV9pwEudQH5n","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e0a004dbf16fce874fe34fb94d69c06ea294adc1f39538a2c69502eb4bd8d6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/576bTOM9sJdV9pwEudQH5n.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/576bTOM9sJdV9pwEudQH5n.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3juMyFyvWuPKJVq7d2g607.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3juMyFyvWuPKJVq7d2g607.
{"copyright_id":"0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177","isrc":"GBAYD9300290","name":"Spiegel im Spiegel","registered_at":"2026-06-04T15:31:46Z","spotify_id":"3kX2M1yleEVHaEbaCuy74J","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88878a52a6ebd3424eb87af88b2ed187383e7a2433b7852ae8ba801db0f2f177. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3kX2M1yleEVHaEbaCuy74J.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3kX2M1yleEVHaEbaCuy74J.