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 0x273d5d3561d6f87fc0301623c6c1387ced6d68e99809c3271c2a48b24dce460b. 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/4190075a-ccc8-4eeb-97bf-98718abc00a6.json and https://artists.proofprofile.net/proofs/artist/4190075a-ccc8-4eeb-97bf-98718abc00a6.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 0xf510661d8b378e114659fb540516926ec043f9254af68c8db3ad931d2ce8c18c. 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/3EWthCrBxck76hnFJDw9Lc.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/3EWthCrBxck76hnFJDw9Lc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab913c5327c74f71922cbb4e9fc7e438b4b2648e36218db0c2de490534b8c40. 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/18fpfLW4jKdJHQaBMTMVjk.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/18fpfLW4jKdJHQaBMTMVjk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8f401e95ed5fc86fec29767059c08eac16bf5133aa75ec28a949bdd0a8ec35. 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/2HCgW6LacS4oryYzYvVil2.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/2HCgW6LacS4oryYzYvVil2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f6028faaf7625d773c8bbca6823f46b459dfcb62673f636aade94a68321356. 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/6UlatDfAEM1q45QKreKw3J.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/6UlatDfAEM1q45QKreKw3J.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabf2dc20073c4b8a54fe17f2efb6174316add3f2a8fc13f91e7247c7e551635. 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/2wYYOHya0bck6ig4pV4yPj.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/2wYYOHya0bck6ig4pV4yPj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906547cffed62aac0ced2909832b75ad81564516308b9f93ef8036987d98cec0. 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/2gsnWQGJdgNTi88C3CdLwd.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/2gsnWQGJdgNTi88C3CdLwd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f1b76c190c46ffd69351158b766328d6737930238c5667dfcd13eb21a53380. 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/3Q8zp5B1OqdyNP7whOGd68.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/3Q8zp5B1OqdyNP7whOGd68.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86c5e74fe1723d4218ba3972b55f7c12e0bdd6f3e7787994e67f06a705911d8. 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/65dBDctX95f17CuanmXVZl.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/65dBDctX95f17CuanmXVZl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da00c1d9820ffa3b8521f021e94314e3b83e9be56d32f80001a26aec5125e51. 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/7rZUwZvEXY8nfF4u5a6OIr.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/7rZUwZvEXY8nfF4u5a6OIr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8832413f2b0a78f2e590ecd1700e0098a92338c7e39f8109a9cf56466f3327. 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/7lBcwHvUVvJ53EqlqyzoNG.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/7lBcwHvUVvJ53EqlqyzoNG.
{"copyright_id":"0x6feb92e40d5f1ced6f6eaa7359635667761ed49f96878ca466ebbdd41c6abd3e","isrc":"FRX872171796","name":"La Fin Du Monde","registered_at":"2026-06-18T22:32:23Z","spotify_id":"3SlIzNnazIzGwFdCbdN3rI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6feb92e40d5f1ced6f6eaa7359635667761ed49f96878ca466ebbdd41c6abd3e. 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/3SlIzNnazIzGwFdCbdN3rI.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/3SlIzNnazIzGwFdCbdN3rI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3d7125cb550d383b86f51f70f1299c28c7e82d1ca36eab54eb2b1cb52b57a3. 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/6C1eyj5o05o2JvjhLFXTCL.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/6C1eyj5o05o2JvjhLFXTCL.
{"copyright_id":"0x513aa77475dc9923abb55f0d3e64b6b2f9b9e23dcd94080e561d180e87ed53c9","isrc":"DGA052231618","name":"Start-up Nationale","registered_at":"2026-06-09T11:30:40Z","spotify_id":"2wGsxnM5F4WWpJydfE9bWL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513aa77475dc9923abb55f0d3e64b6b2f9b9e23dcd94080e561d180e87ed53c9. 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/2wGsxnM5F4WWpJydfE9bWL.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/2wGsxnM5F4WWpJydfE9bWL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f79de4d4d7e6c3d1884e55b06c9170619c4125c11ba410479d197c7cab3d40. 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/2RPqeuPLzJyVkS511XDwt2.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/2RPqeuPLzJyVkS511XDwt2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513aa77475dc9923abb55f0d3e64b6b2f9b9e23dcd94080e561d180e87ed53c9. 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/4th45pXtqK2d4lWnVSSTe5.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/4th45pXtqK2d4lWnVSSTe5.
Gwendoline (Umwelt & Traumstadt remixes)
{"copyright_id":"0xb6b600773ec07ad30b11479ef2364406829f686c640c5ba3e8033fe0fd8d987c","isrc":"FR10S2294587","name":"Saint-Valentin - À Saint-Maclou","registered_at":"2026-06-22T21:07:27Z","spotify_id":"6XpNsvoZMclYgr4SqhhC3a","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b600773ec07ad30b11479ef2364406829f686c640c5ba3e8033fe0fd8d987c. 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/6XpNsvoZMclYgr4SqhhC3a.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/6XpNsvoZMclYgr4SqhhC3a.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8f401e95ed5fc86fec29767059c08eac16bf5133aa75ec28a949bdd0a8ec35. 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/5sYlJ8BOYOevDFxRc07Tbu.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/5sYlJ8BOYOevDFxRc07Tbu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8832413f2b0a78f2e590ecd1700e0098a92338c7e39f8109a9cf56466f3327. 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/6t7z8YBJMYIRrAryQhJtuN.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/6t7z8YBJMYIRrAryQhJtuN.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f6028faaf7625d773c8bbca6823f46b459dfcb62673f636aade94a68321356. 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/1W45fcXlYMl9tM1JaMUQ20.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/1W45fcXlYMl9tM1JaMUQ20.