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 0x07f8c10f24ecbe06fbdf1f48c468cccc42cdcf341c0751089342efbac5a8f9ea. 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/756c1adc-5709-47e8-98e4-d329ebada080.json and https://artists.proofprofile.net/proofs/artist/756c1adc-5709-47e8-98e4-d329ebada080.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 0xfdc4aec7fd25aeca97ab57582c82a1133b0f77a81d9b029efaee9c26993f322c. 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/30D9x5LFgL2o9xidjX2wtE.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/30D9x5LFgL2o9xidjX2wtE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa203ce1ba884d2488b95dff7eee599ac2a13acf18f847bd257901d00b44f6c42. 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/7AUMxm5ArZPHojwDbdi8Vi.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/7AUMxm5ArZPHojwDbdi8Vi.
{"copyright_id":"0xd3d67711a1ff460f1b1b58069fe4ba40fa32c5fcc2ca6a70a5f52a4869ae473b","isrc":"FR9W12353743","name":"NOTRE DAME","registered_at":"2026-06-01T18:45:40Z","spotify_id":"5RJcEoBhxDo8QgmKfr3JG8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d67711a1ff460f1b1b58069fe4ba40fa32c5fcc2ca6a70a5f52a4869ae473b. 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/5RJcEoBhxDo8QgmKfr3JG8.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/5RJcEoBhxDo8QgmKfr3JG8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f35ae406d1a0c74145670f13189c53f0a52fbc33cd230c374fde90c5d9905e. 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/6yqwxY8qifBBhyryjZutxk.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/6yqwxY8qifBBhyryjZutxk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4812ef960445a575db68a793b676ddb14d87b9614971d7a8523ceae9848f5106. 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/2PWJx5FwMrMVEaTjwYait1.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/2PWJx5FwMrMVEaTjwYait1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027dc0a49118291361f0a85a8d023f107b05dec4b1135fb0d52bf41ae6d47bbd. 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/2BvjmY4Mp5q1AHL0laetd6.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/2BvjmY4Mp5q1AHL0laetd6.
{"copyright_id":"0xcc39c6bd5b1ec8cdcfe7ccafc9556d2b3a2ab02094a9e07738d290052fa7f118","isrc":"FR7O52300790","name":"Ça mène à rien","registered_at":"2026-06-01T11:26:50Z","spotify_id":"7GLtEcaxxQpdK63YsiG51g","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc39c6bd5b1ec8cdcfe7ccafc9556d2b3a2ab02094a9e07738d290052fa7f118. 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/7GLtEcaxxQpdK63YsiG51g.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/7GLtEcaxxQpdK63YsiG51g.
Reggae & Calypso (Russ Millions x Buni x YV x CH (GMD) x SwitchOTR x Gazo x RoseReal) - Remix
One Of A Kind Music Presents: Reggae & Calypso (Remix)
{"copyright_id":"0x4ce1034d72c6a92f4a4a1fd1003105125a4a171d2b82f9fa9642a6e6b54f8691","isrc":"QM4TX2229006","name":"Reggae & Calypso (Russ Millions x Buni x YV x CH (GMD) x SwitchOTR x Gazo x RoseReal) - Remix","registered_at":"2026-06-04T07:28:19Z","spotify_id":"2cQyipGn0DEXYLgoeIwRFe","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce1034d72c6a92f4a4a1fd1003105125a4a171d2b82f9fa9642a6e6b54f8691. 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/2cQyipGn0DEXYLgoeIwRFe.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/2cQyipGn0DEXYLgoeIwRFe.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc4aec7fd25aeca97ab57582c82a1133b0f77a81d9b029efaee9c26993f322c. 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/5UPKXKuv7C5RIaxPfyHjAI.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/5UPKXKuv7C5RIaxPfyHjAI.
No Borders: European Compilation Project
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35dcc2eee620556e6498589e1412955d94a9db3ffeb0e556e95d7bcd945f72. 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/54zl9LpbL4ZGBFR0Pmq8rP.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/54zl9LpbL4ZGBFR0Pmq8rP.
22 Carats (recorded at Les Studios de la Seine, Paris)
{"copyright_id":"0x9ec8fce29689d9b6d2f6455d357cd98ae53ce355a5cf3fcb829264a57de91a1d","isrc":"GBARL2201257","name":"22 Carats (recorded at Les Studios de la Seine, Paris)","registered_at":"2026-06-10T12:44:02Z","spotify_id":"0y1b8AVr5LuKPhjZsXpyuf","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec8fce29689d9b6d2f6455d357cd98ae53ce355a5cf3fcb829264a57de91a1d. 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/0y1b8AVr5LuKPhjZsXpyuf.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/0y1b8AVr5LuKPhjZsXpyuf.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd35dcc2eee620556e6498589e1412955d94a9db3ffeb0e556e95d7bcd945f72. 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/1fmVM7nzDB3pUPhPQgzYoT.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/1fmVM7nzDB3pUPhPQgzYoT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde53000a6d8a82c40915661c80e371580ac597da6a9e7fd5cde11257ab3ed086. 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/1VyY2AnSDanmZbQeXgcHZ1.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/1VyY2AnSDanmZbQeXgcHZ1.
{"copyright_id":"0x4f41504a4d1c53ddb085afb2cc9c33aef2169d8ca90d7277a2bc357a72ff897b","isrc":"FR9W12101938","name":"MON CHER (feat. Unknown T & Pa Salieu)","registered_at":"2026-06-23T03:03:39Z","spotify_id":"1h53kkKNCwg7GBs8fv8DfZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41504a4d1c53ddb085afb2cc9c33aef2169d8ca90d7277a2bc357a72ff897b. 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/1h53kkKNCwg7GBs8fv8DfZ.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/1h53kkKNCwg7GBs8fv8DfZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f208b84bb768cb06d27197c491973c9d584b50d9ce0bbb44ea127bfb850e0. 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/70bMoHeE4bJ8AwP3qrUe1F.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/70bMoHeE4bJ8AwP3qrUe1F.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5f208b84bb768cb06d27197c491973c9d584b50d9ce0bbb44ea127bfb850e0. 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/7we7d80UQ2Wq9GCi4fcvAo.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/7we7d80UQ2Wq9GCi4fcvAo.
NO LÈCHE 🚫👅 (feat. Favé, Kerchak & Leto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42bd9a73f845fcaa391db5ce3502dea9043737ea47b2f2b08c62249defc2d35. 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/6D1HiF2e3Z0F8FwQ5uLxwn.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/6D1HiF2e3Z0F8FwQ5uLxwn.
{"copyright_id":"0xb45a9cd1a59afa95d47783fa1eec83d065dee4c81c65ba4446192e58c08fd78f","isrc":"FRX872180113","name":"Love & Lové","registered_at":"2026-06-04T07:07:35Z","spotify_id":"3TCtWxTMMZ8wnWFLnvtJsJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45a9cd1a59afa95d47783fa1eec83d065dee4c81c65ba4446192e58c08fd78f. 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/3TCtWxTMMZ8wnWFLnvtJsJ.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/3TCtWxTMMZ8wnWFLnvtJsJ.
{"copyright_id":"0xb45a9cd1a59afa95d47783fa1eec83d065dee4c81c65ba4446192e58c08fd78f","isrc":"FRX872180113","name":"Love & Lové","registered_at":"2026-06-04T07:07:35Z","spotify_id":"3QZ0iZsciyfyQfV0qEQgLI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45a9cd1a59afa95d47783fa1eec83d065dee4c81c65ba4446192e58c08fd78f. 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/3QZ0iZsciyfyQfV0qEQgLI.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/3QZ0iZsciyfyQfV0qEQgLI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa471dbb41426eacb4496a3a8e659d577049b8cb9a637b2f734a1b5e61503626e. 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/7DfBKw4PYAar1FXOFLqMFE.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/7DfBKw4PYAar1FXOFLqMFE.