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 0xef285efd0fe5097fd4893c4f90ad85084334dbba71c3efafa5b4da81e9663326. 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/b4396729-010b-4634-bb4e-311b6a51948f.json and https://artists.proofprofile.net/proofs/artist/b4396729-010b-4634-bb4e-311b6a51948f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Different Trains: America—Before the war
You Are (Variations): I. You are wherever your thoughts are
{"copyright_id":"0xb55b8911b5daed0ef8d4eec46bfb6be74a8d42641de9950a1256d5c74a2e0ec8","isrc":"USNO18716901","name":"Come Out","registered_at":"2026-06-19T09:53:06Z","spotify_id":"1lAov1z9ZWNr1KKyBo8hNw","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 0xb55b8911b5daed0ef8d4eec46bfb6be74a8d42641de9950a1256d5c74a2e0ec8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1lAov1z9ZWNr1KKyBo8hNw.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/1lAov1z9ZWNr1KKyBo8hNw.
Music for Mallet Instruments, Voices and Organ
{"copyright_id":"0x952532becb5ba420fadf6f9400b58c9d577725f0d60348bac3c323040173c995","isrc":"USNO19022005","name":"Music for Mallet Instruments, Voices and Organ","registered_at":"2026-06-09T16:55:06Z","spotify_id":"4lxunSFYkcTdsbxwg2Vpzx","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952532becb5ba420fadf6f9400b58c9d577725f0d60348bac3c323040173c995. 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/4lxunSFYkcTdsbxwg2Vpzx.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/4lxunSFYkcTdsbxwg2Vpzx.
{"copyright_id":"0x823c3c30e5351f12f6eff34b1aefefa34f24edbf73c167fc3280f93110cccbd6","isrc":"USN019745102","name":"Music for 18 Musicians: Pulses","registered_at":"2026-06-06T03:42:42Z","spotify_id":"3RT8IcDHYsBLPXlqxZX0Zn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823c3c30e5351f12f6eff34b1aefefa34f24edbf73c167fc3280f93110cccbd6. 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/3RT8IcDHYsBLPXlqxZX0Zn.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/3RT8IcDHYsBLPXlqxZX0Zn.
You Are (Variations): II. Shiviti Hashem l'negdi (I place the Eternal before me)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c6f0a53319a15d2053d51f7a21b2a66f8603d2b909fdd31f3573d5c90e63c7. 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/6KMz5cSjny18cbpiQB1Gz6.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/6KMz5cSjny18cbpiQB1Gz6.
{"copyright_id":"0x4d84166073ff47d4cb6b69e3dadec91797402f53ec1ec739ccc08670236942ed","isrc":"USN019745103","name":"Music for 18 Musicians: Section I","registered_at":"2026-06-06T16:42:01Z","spotify_id":"3z8VqidPlzvXfslOJ6cZqI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d84166073ff47d4cb6b69e3dadec91797402f53ec1ec739ccc08670236942ed. 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/3z8VqidPlzvXfslOJ6cZqI.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/3z8VqidPlzvXfslOJ6cZqI.
You Are (Variations): III. Explanations come to an end somewhere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16042e2c0fef1fd3c92a83735f2f4613b6b8224a2225f8930ad48942c9706abc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5Vpc4grCSTF4F6Y3Gnefz6.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/5Vpc4grCSTF4F6Y3Gnefz6.
{"copyright_id":"0xd74916bd2870f9a60f0779076a47464aede9f8d0f4708a87aae92004469c3eac","isrc":"USN019745104","name":"Music for 18 Musicians: Section II","registered_at":"2026-06-09T07:09:48Z","spotify_id":"3n8rjjOMlbMHrJRaXKpYAI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74916bd2870f9a60f0779076a47464aede9f8d0f4708a87aae92004469c3eac. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3n8rjjOMlbMHrJRaXKpYAI.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/3n8rjjOMlbMHrJRaXKpYAI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aca639ccd4460523f04a7f230ba5b1c5f7a595aad6f81972769fa46362f4659. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4JhUdCdpw6ajwucpFaBJz1.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/4JhUdCdpw6ajwucpFaBJz1.
You Are (Variations): IV. Ehmor m’aht, v’ahsay harbay (Say little and do much)
The Desert Music: Second Movement (Moderate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273c20e4db319d98378511265bf807fa9df897b6930760a521aefc0825e4d68c. 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/0kZe40UWS96KEtyA0yDnLh.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/0kZe40UWS96KEtyA0yDnLh.
The Desert Music: Third Movement, Pt. 1 (Slow)
{"copyright_id":"0x073582a14f26af782086ae609c7463ebdc5dba04705f45299fe932fcc1244e9e","isrc":"USN019745106","name":"Music for 18 Musicians: Section IIIB","registered_at":"2026-06-10T03:14:21Z","spotify_id":"26oyIa0gUZLLvymadyhkgE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073582a14f26af782086ae609c7463ebdc5dba04705f45299fe932fcc1244e9e. 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/26oyIa0gUZLLvymadyhkgE.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/26oyIa0gUZLLvymadyhkgE.
{"copyright_id":"0x774679fe5720cff4bfe6759efe887f50b44299eff4df7bb1634843c181b4f6b5","isrc":"USNO19745118","name":"New York Counterpoint: II. Slow","registered_at":"2026-06-24T11:18:12Z","spotify_id":"1H5Vc906sWZEduP0r8MLWZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774679fe5720cff4bfe6759efe887f50b44299eff4df7bb1634843c181b4f6b5. 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/1H5Vc906sWZEduP0r8MLWZ.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/1H5Vc906sWZEduP0r8MLWZ.
The Desert Music: Third Movement, Pt. 2 (Moderate)
{"copyright_id":"0xe1a713a74e77f980b6a852bed51365766311e5c90e4982ed454357c4362d2bae","isrc":"USNO19745119","name":"New York Counterpoint: III. Fast","registered_at":"2026-06-24T11:18:16Z","spotify_id":"3jIRgK4lY9vZe27ANLvpDz","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a713a74e77f980b6a852bed51365766311e5c90e4982ed454357c4362d2bae. 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/3jIRgK4lY9vZe27ANLvpDz.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/3jIRgK4lY9vZe27ANLvpDz.
The Desert Music: Third Movement, Pt. 3 (Slow)
{"copyright_id":"0x0786c6e1cae0dd31f8c8ba8a1ba785887fb524805f3dd1a03667a25a18ee7a2b","isrc":"USNO19745116","name":"Eight Lines (Octet)","registered_at":"2026-06-23T02:32:41Z","spotify_id":"3u0mKDsmKuewyvUW4vteyM","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0786c6e1cae0dd31f8c8ba8a1ba785887fb524805f3dd1a03667a25a18ee7a2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3u0mKDsmKuewyvUW4vteyM.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/3u0mKDsmKuewyvUW4vteyM.
The Desert Music: Fourth Movement (Moderate)
{"copyright_id":"0xa10ca2bb1d2ca53f63495d0d47d542d26e1a7a4ce0f7b0b2ba088d14073930e7","isrc":"USN019745110","name":"Music for 18 Musicians: Section VII","registered_at":"2026-06-20T23:59:47Z","spotify_id":"49STWHRKNzncd3Ul2e3lWU","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10ca2bb1d2ca53f63495d0d47d542d26e1a7a4ce0f7b0b2ba088d14073930e7. 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/49STWHRKNzncd3Ul2e3lWU.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/49STWHRKNzncd3Ul2e3lWU.
{"copyright_id":"0xea17f5596adc38f9f972737557a1027b4debfbda7cc4d2d078893e6a9827da6d","isrc":"USN019745111","name":"Music for 18 Musicians: Section VIII","registered_at":"2026-06-21T00:08:35Z","spotify_id":"15seNa0RTuUkBufGz3O4ae","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea17f5596adc38f9f972737557a1027b4debfbda7cc4d2d078893e6a9827da6d. 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/15seNa0RTuUkBufGz3O4ae.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/15seNa0RTuUkBufGz3O4ae.
{"copyright_id":"0x3dc4a8cab5d48936b65a0d3b7ee884d1fdcb16215e46ea8d6ba92d2e12143081","isrc":"USN019745112","name":"Music for 18 Musicians: Section IX","registered_at":"2026-06-21T22:30:36Z","spotify_id":"7diB8C7FvYNQ2MfacCJgxv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc4a8cab5d48936b65a0d3b7ee884d1fdcb16215e46ea8d6ba92d2e12143081. 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/7diB8C7FvYNQ2MfacCJgxv.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/7diB8C7FvYNQ2MfacCJgxv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2b77f1cb082b7d6eb6b8068c0faaa755f6179f44011a5f09966f50e8b55153. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/66T5umE1YO4Iepaxg4S61F.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/66T5umE1YO4Iepaxg4S61F.
{"copyright_id":"0x2e94e7cece9bdf2af20660a092a7eac8db7d05a4fb5da1b53ff9f02663e03afa","isrc":"USN019745114","name":"Music for 18 Musicians: Section XI","registered_at":"2026-06-23T02:33:46Z","spotify_id":"0iYegQ5ZWIVU7EMuXEuoGz","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e94e7cece9bdf2af20660a092a7eac8db7d05a4fb5da1b53ff9f02663e03afa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0iYegQ5ZWIVU7EMuXEuoGz.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/0iYegQ5ZWIVU7EMuXEuoGz.
{"copyright_id":"0xa955e3de0f8dd1cb8eedf1262e6d0d61bd0e6fd7c51cf02716561567017b2fed","isrc":"USN019745115","name":"Music for 18 Musicians: Pulses II","registered_at":"2026-06-23T02:33:13Z","spotify_id":"7GrYAuc2JJL7oeFPTEWmf2","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955e3de0f8dd1cb8eedf1262e6d0d61bd0e6fd7c51cf02716561567017b2fed. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7GrYAuc2JJL7oeFPTEWmf2.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/7GrYAuc2JJL7oeFPTEWmf2.
Reich: Sextet - Clapping Music - Music for Pieces of Wood
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac400beed0d365f381180ed2e319a4ab97136b033a4b4f8e6378ff7c34a604f. 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/1TFc40NC41tun760JkbZ6s.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/1TFc40NC41tun760JkbZ6s.
Patterns in Motion - The Great Minimalists, Vol. II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9edd46090406ea0415161ab554c3c74baaa88aa012a032ef77f57c54384f6d3. 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/6I7QkvNdkndJ2ek17Evmg3.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/6I7QkvNdkndJ2ek17Evmg3.