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 0x9e52950da726801c5a87ceb06e247424ecec2b250cf60c7187b266a495db105b. 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/9f037c37-5091-49f5-9509-1f86ac8a3070.json and https://artists.proofprofile.net/proofs/artist/9f037c37-5091-49f5-9509-1f86ac8a3070.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 0x615568468512e5560dc1463c96a8f0db474727650cb870df0618129485786274. 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/33ZWF9tp4LSwZJO26JFG61.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/33ZWF9tp4LSwZJO26JFG61.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff2bfd8a320eb388296e013b4ad3599d59f4d1b89e32c25ca85b676608a7a0b. 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/5UBUve9uGIweLuKGWgvtaC.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/5UBUve9uGIweLuKGWgvtaC.
{"copyright_id":"0x6c58a91abcd416f9f05b091d1ed2a3160a43d56a517b6729d4dea1a54069462a","isrc":"USX9P0676262","name":"Understanding Each Other","registered_at":"2026-06-06T15:03:21Z","spotify_id":"6DFoLY4RooouzF1ciFvxVZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c58a91abcd416f9f05b091d1ed2a3160a43d56a517b6729d4dea1a54069462a. 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/6DFoLY4RooouzF1ciFvxVZ.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/6DFoLY4RooouzF1ciFvxVZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37906a008c293674a53c67d813c0d6c8586e0ae2967c96553b966dd86155da67. 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/3Zs3WMvtFoEmzEh1eONPTW.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/3Zs3WMvtFoEmzEh1eONPTW.
{"copyright_id":"0x96a698b0057b52d503ec27da4e8c2bd84f78e186b9f5d2c9a645f254eded6ac5","isrc":"USX9P0676264","name":"Another Chance","registered_at":"2026-06-09T14:01:44Z","spotify_id":"3ortPXg9xY8VBHBPsVlxaC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a698b0057b52d503ec27da4e8c2bd84f78e186b9f5d2c9a645f254eded6ac5. 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/3ortPXg9xY8VBHBPsVlxaC.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/3ortPXg9xY8VBHBPsVlxaC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b337a792397a965897162c3663033ababddb27d96fcc3bd6b85f573cb229ea. 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/4zIqJl0F3hSQiciWMu7KRt.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/4zIqJl0F3hSQiciWMu7KRt.
{"copyright_id":"0x9a72f131eaa8f51a5e21a6fd8bad0845545fb698ab89a8fac579536927deffbc","isrc":"USX9P0676266","name":"Slowly Healing","registered_at":"2026-06-10T00:16:28Z","spotify_id":"0DtLlLslqzBcPIMPOO4314","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a72f131eaa8f51a5e21a6fd8bad0845545fb698ab89a8fac579536927deffbc. 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/0DtLlLslqzBcPIMPOO4314.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/0DtLlLslqzBcPIMPOO4314.
{"copyright_id":"0x1a1ad2ab2c3f07c5cc48c9674c3c9bf75a951a7f86cd989999ad19b883194dd4","isrc":"USX9P0676267","name":"True Friends","registered_at":"2026-06-05T19:54:57Z","spotify_id":"2LHbDCoCzoDb9BkiSGbP4H","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1ad2ab2c3f07c5cc48c9674c3c9bf75a951a7f86cd989999ad19b883194dd4. 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/2LHbDCoCzoDb9BkiSGbP4H.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/2LHbDCoCzoDb9BkiSGbP4H.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375663e53d7bfb866053dedca37025cf236bb0c133d2e0f566f65c9f58d853a1. 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/5KGUtmUhNO3gyavhGhOvXz.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/5KGUtmUhNO3gyavhGhOvXz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd57e264ee3c1f97d4a87e6a0788f0f65b6ec4aaf32acee79b80c0dbc91cad3a. 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/66EUcNS5ZtDBaQJylznMd4.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/66EUcNS5ZtDBaQJylznMd4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f6ee4081a3be224b8d8a807512eb927c2b6055a9b09d696f6ee8516df5f660. 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/6ZwdvEcJ43eWbpbQQZj7BW.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/6ZwdvEcJ43eWbpbQQZj7BW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b3247e52d3c52297b5954f43f8165c5ba8e143f5596ed897aabf1db5fcb37c. 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/4YhbyBfST3uiYaUI61YMwo.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/4YhbyBfST3uiYaUI61YMwo.
{"copyright_id":"0x9213e9dead640376c1e23d3f8d75c957663b237ae5b75dac163e7d81feba8631","isrc":"USX9P0676272","name":"As Times Change","registered_at":"2026-06-07T11:18:35Z","spotify_id":"4ku8qD8FVkCcGuz3WQEcWc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9213e9dead640376c1e23d3f8d75c957663b237ae5b75dac163e7d81feba8631. 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/4ku8qD8FVkCcGuz3WQEcWc.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/4ku8qD8FVkCcGuz3WQEcWc.
{"copyright_id":"0x7a4d7c391cd20ff4aa562bf2794b7a14700a328b5ba0cb884aa438014b8a12f3","isrc":"USX9P0676273","name":"Floating on Dreams","registered_at":"2026-06-07T17:39:18Z","spotify_id":"7iSKLRskhOkN0FqWhtmEdg","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4d7c391cd20ff4aa562bf2794b7a14700a328b5ba0cb884aa438014b8a12f3. 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/7iSKLRskhOkN0FqWhtmEdg.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/7iSKLRskhOkN0FqWhtmEdg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0783c9fb2ef05a4a7d1873864f919add52b728bdea6156c871e0cef9f2b991. 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/0HM6aLr73HLMKL3fAV2o8q.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/0HM6aLr73HLMKL3fAV2o8q.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d6140968c033d99994f3e4b3eded906a0edeaa073ea077ff249912d29c3dda. 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/4KHAs0QluXa8JwjOT0n79b.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/4KHAs0QluXa8JwjOT0n79b.
{"copyright_id":"0x83c0b49dbfab13f3292f081c852ea40e08d80cac28137ffc46e20bfd40943c57","isrc":"USX9P0676276","name":"Echoes of Healing","registered_at":"2026-06-11T01:56:30Z","spotify_id":"4ZCfkuWvuEvzRUZ51rQ5b0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c0b49dbfab13f3292f081c852ea40e08d80cac28137ffc46e20bfd40943c57. 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/4ZCfkuWvuEvzRUZ51rQ5b0.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/4ZCfkuWvuEvzRUZ51rQ5b0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebca131863855fa07f6dc300829cb1b657a1c421228a881e6bd667db558e963. 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/4YA1JFoUnmNprhVB46eR6R.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/4YA1JFoUnmNprhVB46eR6R.