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 0x384a63a1f014b0bec764a390dcd6f0c34c1f4bafbb7bc09a6c52b4481096da27. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7bddca2-cff2-4490-ba0e-7d12c90aba0c.json and https://artists.proofprofile.net/proofs/artist/a7bddca2-cff2-4490-ba0e-7d12c90aba0c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7585e313c7053f5a2f6d0780d7613bf44277801456bebca8c1fd8f3c2d7b2017. 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/0jF7dbG0iniYX2uSTbb0I0.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/0jF7dbG0iniYX2uSTbb0I0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459b6b192812d2c2713e7a2b7b41ad73940c4e57ed36c084b2f74bc867020382. 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/5UuaERUpofUHDz239DBbDe.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/5UuaERUpofUHDz239DBbDe.
{"copyright_id":"0x2ce2ef8f63e8b80997dfc1666efa0dea9b1669f20fb7298ac191aa0387f3f573","isrc":"QZDA62321859","name":"A Glimpse of the Abyss","registered_at":"2026-06-07T02:01:09Z","spotify_id":"0uhmHEcR1VxSRw3GHjjaCZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce2ef8f63e8b80997dfc1666efa0dea9b1669f20fb7298ac191aa0387f3f573. 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/0uhmHEcR1VxSRw3GHjjaCZ.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/0uhmHEcR1VxSRw3GHjjaCZ.
A Glimpse of the Abyss - alternative version
{"copyright_id":"0x24fb5031de1805aa008db5cc90f76412c65828c0fa7bc2169f0691cb9f5b58b6","isrc":"QZDA72387411","name":"A Glimpse of the Abyss - alternative version","registered_at":"2026-06-07T06:58:08Z","spotify_id":"2yckbSFgf98UlMP2uT7jOO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24fb5031de1805aa008db5cc90f76412c65828c0fa7bc2169f0691cb9f5b58b6. 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/2yckbSFgf98UlMP2uT7jOO.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/2yckbSFgf98UlMP2uT7jOO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e35dcb89098ae71fe126159cd0b617bdab569aed86c33551135d3edddbf40. 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/5wfgFUtboSOHzj2VfRwrcz.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/5wfgFUtboSOHzj2VfRwrcz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95207a774fa89f8d8802ad609b01f0ab785c1f490beff2c4890180f1a4d82e92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4BHWTTAyi3b948kDOwD2ej.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/4BHWTTAyi3b948kDOwD2ej.
{"copyright_id":"0xe9d4d187df36b06d94f40b265db602e9b0c22380b692f6c5ca0a408b6ec81b00","isrc":"QZDA72387414","name":"Did you know","registered_at":"2026-06-18T11:31:33Z","spotify_id":"1VzG9dckmUkluJtNNXABvH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d4d187df36b06d94f40b265db602e9b0c22380b692f6c5ca0a408b6ec81b00. 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/1VzG9dckmUkluJtNNXABvH.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/1VzG9dckmUkluJtNNXABvH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd2e9053f560c0258cad9da03ea4535e373717a71944ce987e930030885b634. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1gLEtslonMqd4b0V019o5G.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/1gLEtslonMqd4b0V019o5G.
Simple folds (remix contest winner's entry)
Simple folds - remix contest winner's entry
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cd76e1fb9a8d53d65ad0ec9b27bb9e15c50be61522701b28a0b90923d036b5. 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/2LU7veq6gDzKdWFXz3ip2h.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/2LU7veq6gDzKdWFXz3ip2h.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe089e907cb5fd1caa8abfa4ce0f0a1b195a5b6ffc0fd7d8f4d6fb0b96efb58fc. 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/0JJa8MHLh7hNdLq0zQSTfF.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/0JJa8MHLh7hNdLq0zQSTfF.
{"copyright_id":"0x443a56310caa16a2cbde8d995062acb3f362c4d514185474d68651339c3f515f","isrc":"QZTAX2342263","name":"Home - Instrumental Version","registered_at":"2026-06-18T18:45:47Z","spotify_id":"3pILslhowCnzJdebjep0lZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a56310caa16a2cbde8d995062acb3f362c4d514185474d68651339c3f515f. 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/3pILslhowCnzJdebjep0lZ.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/3pILslhowCnzJdebjep0lZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d08689468776d8bc92208e7edcb06bf37ab033dd93eaa3a4890789ff0c9f92e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7vTzmksG3C1ssPxaqYaJKH.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/7vTzmksG3C1ssPxaqYaJKH.
{"copyright_id":"0x881689f052b18e3f320d0c4e30471edda95198286e048cb2315aa23d0831201a","isrc":"QZWFQ2306781","name":"Breeze - Instrumental Version","registered_at":"2026-06-27T09:21:25Z","spotify_id":"3VfasG8lvW0F1nQYTSNwna","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881689f052b18e3f320d0c4e30471edda95198286e048cb2315aa23d0831201a. 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/3VfasG8lvW0F1nQYTSNwna.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/3VfasG8lvW0F1nQYTSNwna.
{"copyright_id":"0xc284f0e06e9703a4c96dbdb6e2767f3f1e089d7cbae8c8d31617b8f4b53a12fc","isrc":"QZHN32404708","name":"Breeze - Riemann remix","registered_at":"2026-06-18T18:44:50Z","spotify_id":"2iackUzPFRdrdNcVi4EmQ2","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc284f0e06e9703a4c96dbdb6e2767f3f1e089d7cbae8c8d31617b8f4b53a12fc. 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/2iackUzPFRdrdNcVi4EmQ2.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/2iackUzPFRdrdNcVi4EmQ2.
{"copyright_id":"0x0fe74432bc94e8f68981b5eae3aba528b4f150bfa6103ecbeae4b2d51e2af15d","isrc":"QZHNB2434455","name":"Lavender Sky","registered_at":"2026-06-05T21:52:48Z","spotify_id":"5GksMuzWflMVnf7RpHs8sK","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe74432bc94e8f68981b5eae3aba528b4f150bfa6103ecbeae4b2d51e2af15d. 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/5GksMuzWflMVnf7RpHs8sK.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/5GksMuzWflMVnf7RpHs8sK.
{"copyright_id":"0xddcb60064f82404440e323a7227e2bac4778c752d575776b8b5cff1dc538741e","isrc":"QZHNB2434456","name":"Lavender Sky - Instrumental Version","registered_at":"2026-06-24T17:38:14Z","spotify_id":"79l2vlBuxhwmNQZpSsciob","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcb60064f82404440e323a7227e2bac4778c752d575776b8b5cff1dc538741e. 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/79l2vlBuxhwmNQZpSsciob.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/79l2vlBuxhwmNQZpSsciob.
{"copyright_id":"0xa47aa8038a2cba7372ee0bb4db19244bf33ad27b85cb6e5616843e29a21c3f8e","isrc":"QZK6N2412969","name":"VOIDS - shibuya edit","registered_at":"2026-06-09T19:05:41Z","spotify_id":"7t8GROOPe9zgimuXzqdy7r","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47aa8038a2cba7372ee0bb4db19244bf33ad27b85cb6e5616843e29a21c3f8e. 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/7t8GROOPe9zgimuXzqdy7r.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/7t8GROOPe9zgimuXzqdy7r.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0730e33273b58cc8b62b167467c2fe7b19b3fd2497e3cf4c2a6212e5b528d5e1. 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/1kBbU8zQbl7MMQO3KZAR4a.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/1kBbU8zQbl7MMQO3KZAR4a.
{"copyright_id":"0xe9eccb64ddccc3dea6b53befb34daf27ea607089d17a9d1b9c2e24dd6107cfb5","isrc":"QZWV32453415","name":"Evergreen Sea","registered_at":"2026-06-24T17:38:30Z","spotify_id":"3zYTlqbMb0FhFFJQweTsrF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9eccb64ddccc3dea6b53befb34daf27ea607089d17a9d1b9c2e24dd6107cfb5. 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/3zYTlqbMb0FhFFJQweTsrF.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/3zYTlqbMb0FhFFJQweTsrF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f958bf0302e6d0f8e32cf9d1ca61d698c04b6981b68becf1a2987165d20cca. 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/6cVNgC6iCaYV0KJ1Zh8ZPj.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/6cVNgC6iCaYV0KJ1Zh8ZPj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483d4aa8e9d0b1d62aa09377a81004c605e80d0bd109e5479a141d7ed610b789. 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/0wYCXXkrdcPpIDF1PFHgGt.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/0wYCXXkrdcPpIDF1PFHgGt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a946211756fe022428d29513642cf67d2143f29d0c596da009c098646de867. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/66p1KPipf0N5Bg8hIJc3hk.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/66p1KPipf0N5Bg8hIJc3hk.