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 0xa1375a9370991cc7b623698890f6d71e97245d14051dd2c5ae1d8c99f42bd524. 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/98e6cec2-14f9-4c1c-8439-9dfa9ae58a27.json and https://artists.proofprofile.net/proofs/artist/98e6cec2-14f9-4c1c-8439-9dfa9ae58a27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x3a82c847eca1616362704bd0f32eb5962ed260ddebecc62f15a85f9ac583ebff","isrc":"GBKPL2281412","name":"LOST YOU","registered_at":"2026-06-07T07:58:00Z","spotify_id":"5KadTBlx4Ixr0YPG6VpyYC","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 0x3a82c847eca1616362704bd0f32eb5962ed260ddebecc62f15a85f9ac583ebff. 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/5KadTBlx4Ixr0YPG6VpyYC.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/5KadTBlx4Ixr0YPG6VpyYC.
{"copyright_id":"0x4307f2c25a892328ba1f18be90ed4f05cd7c5b8dea7707996c6530440a3e7901","isrc":"GBKPL2281413","name":"EXCEPTIONAL - Instrumental","registered_at":"2026-06-05T13:04:30Z","spotify_id":"0c0EevWjF1fNklzXR1c4S1","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4307f2c25a892328ba1f18be90ed4f05cd7c5b8dea7707996c6530440a3e7901. 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/0c0EevWjF1fNklzXR1c4S1.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/0c0EevWjF1fNklzXR1c4S1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97fa78af2d6eb20076f1097b1771452fdd0405def9201856191beda9cc8b7d5. 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/4O1CRaOBYEEZkqomqYjvay.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/4O1CRaOBYEEZkqomqYjvay.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a0c309997c2b7b5f2f1712252242371e16adde4394eebd3be27af7a204d77a. 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/3PNrKIzVnDDGAsnekImbOI.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/3PNrKIzVnDDGAsnekImbOI.
{"copyright_id":"0xc5067ad6ac5100a41533a51563de87ddf77aa55b7236929ab93ee615f2d0c8fc","isrc":"CA5KR2388211","name":"RIGHT ON TIME","registered_at":"2026-06-17T08:24:35Z","spotify_id":"5HoKMb7uwAezbhkeegBTW6","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5067ad6ac5100a41533a51563de87ddf77aa55b7236929ab93ee615f2d0c8fc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T20:42:33Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5HoKMb7uwAezbhkeegBTW6.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/5HoKMb7uwAezbhkeegBTW6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a0c309997c2b7b5f2f1712252242371e16adde4394eebd3be27af7a204d77a. 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/0usbI63aPqkr77Wo9WlVzn.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/0usbI63aPqkr77Wo9WlVzn.
{"copyright_id":"0x16fee3f4dcc4e3c30db7262dd3402ececfd72b2d5cae096ed1814e72375321bd","isrc":"CA5KR2388212","name":"LET GO (HOLD U BACK)","registered_at":"2026-06-24T15:19:18Z","spotify_id":"3cHdhwpqhHcxG8nhyeMfsT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fee3f4dcc4e3c30db7262dd3402ececfd72b2d5cae096ed1814e72375321bd. 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/3cHdhwpqhHcxG8nhyeMfsT.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/3cHdhwpqhHcxG8nhyeMfsT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08990cdffc0434be18bbfc650a9fe921bf44dc2d0a582ec2163d450470f491f. 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/1RuX3hSlc43LViaSORmKcM.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/1RuX3hSlc43LViaSORmKcM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc21f753789e77e38b5e80012ce49abc2336d643685ce8482a9735f59e3a7033. 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/6ckW3AsQAhpVynQaYw3h2q.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/6ckW3AsQAhpVynQaYw3h2q.
{"copyright_id":"0x0bdb6a4afc0d5d2033c8ae6d3d5c160870d6c100a7fd5c29bf71bfd216e490c5","isrc":"CA5KR2325487","name":"Ghost On The Mend - veggi remix","registered_at":"2026-06-08T20:52:05Z","spotify_id":"5c3sjghivRZjMd0nvSGPUR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdb6a4afc0d5d2033c8ae6d3d5c160870d6c100a7fd5c29bf71bfd216e490c5. 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/5c3sjghivRZjMd0nvSGPUR.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/5c3sjghivRZjMd0nvSGPUR.