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 0xaeb307dc1cd07cddcf5aba56d24ea72e91bed799394bb696756f115f27a60aba. 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/22e268fd-9aff-479c-be98-efed110e9d60.json and https://artists.proofprofile.net/proofs/artist/22e268fd-9aff-479c-be98-efed110e9d60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x1aa93a0113d4f0ac253f64c0da7bc6171fe21fbca1703383e551c5ffc91bf91a","isrc":"US4DG1300067","name":"Daft Punk","registered_at":"2026-06-06T01:37:14Z","spotify_id":"0mkavBIKcfj2WMe7RN1OrQ","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 0x1aa93a0113d4f0ac253f64c0da7bc6171fe21fbca1703383e551c5ffc91bf91a. 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/0mkavBIKcfj2WMe7RN1OrQ.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/0mkavBIKcfj2WMe7RN1OrQ.
{"copyright_id":"0x2b3a335588b3c59c973b4ce0de51209b6a5f1d62297ce340a6568991926d4c85","isrc":"USRC11401470","name":"Problem (Ariana Grande Cover)","registered_at":"2026-06-05T20:54:06Z","spotify_id":"5wHUvSe3ALlFfp8VsWmvIA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3a335588b3c59c973b4ce0de51209b6a5f1d62297ce340a6568991926d4c85. 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/5wHUvSe3ALlFfp8VsWmvIA.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/5wHUvSe3ALlFfp8VsWmvIA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c805aa9a93d6c65c8cd42d4c3f2e728a6e9339accf87afea5b0263f8ec6024. 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/4EHN86Rr3oF4uB1DYsr2q7.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/4EHN86Rr3oF4uB1DYsr2q7.
La La Latch (Sam Smith/Disclosure/Naughty Boy Mashup)
{"copyright_id":"0x2f9350207ae516b7cfea099bbe70f702fb949592b0d5320a8b1fdc21ebbe5633","isrc":"USRC11401835","name":"La La Latch (Sam Smith/Disclosure/Naughty Boy Mashup)","registered_at":"2026-06-06T09:25:03Z","spotify_id":"2ALEdJajYUqQVB0m2q8Qx8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9350207ae516b7cfea099bbe70f702fb949592b0d5320a8b1fdc21ebbe5633. 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/2ALEdJajYUqQVB0m2q8Qx8.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/2ALEdJajYUqQVB0m2q8Qx8.
{"copyright_id":"0xe6425cd99dc56425cfa16e919be6790fe743ee36766ebe8b46597a86001097ca","isrc":"USRC11401836","name":"Rather Be (Clean Bandit Cover)","registered_at":"2026-06-05T20:54:33Z","spotify_id":"05MiHFmBWu81TQ1gLz7AzB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6425cd99dc56425cfa16e919be6790fe743ee36766ebe8b46597a86001097ca. 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/05MiHFmBWu81TQ1gLz7AzB.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/05MiHFmBWu81TQ1gLz7AzB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95752c18a97a2c0b5cfd704a8982a25b97806f0745cd04cf5cc8fa264594b378. 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/2zlnzbrwXVlOdLJ2D3jxxo.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/2zlnzbrwXVlOdLJ2D3jxxo.
Papaoutai (Stromae Cover) (feat. Lindsey Stirling)
{"copyright_id":"0xa2924ba49800c6054869ccd77a8f6fc85380d4c139becf6c0d27709d4d974417","isrc":"USRC11401839","name":"Papaoutai (Stromae Cover) (feat. Lindsey Stirling)","registered_at":"2026-06-07T17:58:59Z","spotify_id":"3OhYcS61PM2GkKfIyfaTzn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2924ba49800c6054869ccd77a8f6fc85380d4c139becf6c0d27709d4d974417. 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/3OhYcS61PM2GkKfIyfaTzn.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/3OhYcS61PM2GkKfIyfaTzn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77031604eb667cd46f57c101d1876dccd16b8ddf8db0bc4f20cf7071ed23baf1. 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/6q4nqL08lMk07WrQ37rmid.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/6q4nqL08lMk07WrQ37rmid.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c4c0ad50f471f1572ab3ef6c197a9f03a663f6a4bc107f028575543a0f5a75. 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/3jzAer6PdBQU0KYVvxTyo8.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/3jzAer6PdBQU0KYVvxTyo8.
{"copyright_id":"0x4534440a8da63b0e782abbfc5968298fd3cd03a309335b17035c1b3626f86ac7","isrc":"US4DG1300064","name":"Hey Momma / Hit the Road Jack","registered_at":"2026-06-09T06:27:02Z","spotify_id":"2XR6uNo55QzCbkLKuSlDdy","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4534440a8da63b0e782abbfc5968298fd3cd03a309335b17035c1b3626f86ac7. 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/2XR6uNo55QzCbkLKuSlDdy.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/2XR6uNo55QzCbkLKuSlDdy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a5749e47cfdd93557b72aa156e27a375c4df2d91a3b0c59aabdae8d4b180b0. 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/18hj0s8eHtGt30whr2PGXB.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/18hj0s8eHtGt30whr2PGXB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8e6f91167ae473aec929606a3c9eec8faa7547923eb09a1d97d5a72006b5d. 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/58mfOQnVHsT0xJ1Q7bEdH7.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/58mfOQnVHsT0xJ1Q7bEdH7.
{"copyright_id":"0x24d1a9cac4fd157057ae2fa7351a67f9cd87ab5daf29d255e3d6b8e17f62ed8a","isrc":"US4DG1300061","name":"Natural Disaster","registered_at":"2026-06-09T15:59:07Z","spotify_id":"0Lr2QQkGY3wXv15Nnuc1zI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d1a9cac4fd157057ae2fa7351a67f9cd87ab5daf29d255e3d6b8e17f62ed8a. 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/0Lr2QQkGY3wXv15Nnuc1zI.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/0Lr2QQkGY3wXv15Nnuc1zI.
{"copyright_id":"0xb1c33bfb87388c3b668e2bbe51beb2a72a22c82fa0bbb7e1ac6b80f5a8fbb26b","isrc":"US4DG1400025","name":"Say Something","registered_at":"2026-06-04T09:45:26Z","spotify_id":"2SrJ0Iw6GobiRGyh2XKZhV","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c33bfb87388c3b668e2bbe51beb2a72a22c82fa0bbb7e1ac6b80f5a8fbb26b. 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/2SrJ0Iw6GobiRGyh2XKZhV.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/2SrJ0Iw6GobiRGyh2XKZhV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0504834a119d112bf03a70ec47f489640065c93bb0c9c1bdae3f32b139c3cb3f. 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/4gGNzDNwhkZmlraXdGewSc.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/4gGNzDNwhkZmlraXdGewSc.
{"copyright_id":"0x019aa6907493eb025e0bc7e38e74e04f4c3cd4e7063d2e2543cb24b71350fdff","isrc":"US4DG1200142","name":"Somebody That I Used to Know","registered_at":"2026-06-07T19:03:05Z","spotify_id":"1S8uwRgAnR028rfWdm4hhO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019aa6907493eb025e0bc7e38e74e04f4c3cd4e7063d2e2543cb24b71350fdff. 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/1S8uwRgAnR028rfWdm4hhO.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/1S8uwRgAnR028rfWdm4hhO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe683655f8a720a4e254bc64db182bb572739749ab1282b9096fae42dd238a8aa. 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/7dJGehjbhJvs3K4fWwYTW1.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/7dJGehjbhJvs3K4fWwYTW1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92701ff22a15d862aeac72b96c08837adb949b43ec2b476be1773be13433f3d. 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/550rQQCGkrTzvp4SfpOPzx.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/550rQQCGkrTzvp4SfpOPzx.
Any Way You Want It (World Championship Medley) - From "Pitch Perfect 2" Soundtrack
Pitch Perfect 2 (Original Motion Picture Soundtrack)
{"copyright_id":"0xcfc04616a4cbe83d72dc1604f017bc8669fb32f083454a7073143017908aeb79","isrc":"USUM71504648","name":"Any Way You Want It (World Championship Medley) - From \"Pitch Perfect 2\" Soundtrack","registered_at":"2026-06-04T15:41:56Z","spotify_id":"4ILuRf97jerQsbLemK4d8e","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc04616a4cbe83d72dc1604f017bc8669fb32f083454a7073143017908aeb79. 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/4ILuRf97jerQsbLemK4d8e.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/4ILuRf97jerQsbLemK4d8e.