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 0xd603a0bded3174dd8369bdf266523151f68145e9cb4e1490f06f11eb74017c00. 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/d8ad29a7-a2cd-4605-bfc0-319bcb68426b.json and https://artists.proofprofile.net/proofs/artist/d8ad29a7-a2cd-4605-bfc0-319bcb68426b.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 0xb372343d36d702244a98b2a145277527de737557452c916b37ea1378fe44d9b5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5McQD64MxWJmfYoRPfegfC.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/5McQD64MxWJmfYoRPfegfC.
20 To Już Nie 04 (The Returners Cloudsfest Remix)
20 To Już Nie 04 - The Returners Cloudsfest Remix
{"copyright_id":"0x4b0d1c2a12eb9cf23f354fd7b95dde2ea933773c26518b6dd4f81d521a904feb","isrc":"PLI292100315","name":"20 To Już Nie 04 - The Returners Cloudsfest Remix","registered_at":"2026-06-23T12:36:45Z","spotify_id":"2iYLXQ1FcQL97S6Dl3Ybc0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0d1c2a12eb9cf23f354fd7b95dde2ea933773c26518b6dd4f81d521a904feb. 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/2iYLXQ1FcQL97S6Dl3Ybc0.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/2iYLXQ1FcQL97S6Dl3Ybc0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d567056eee4f7f833c4bdc3427eb0adb20954414c475115f23eaa083e8dba3. 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/1vh1MPDHwIE8Il3tpTjU1B.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/1vh1MPDHwIE8Il3tpTjU1B.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27398f9b1b8d5947c873af7391f1231b0fa907a7707a236f3f9693e268d27b6. 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/0wdoktGsxTuuxl0GAwuwOH.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/0wdoktGsxTuuxl0GAwuwOH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7471c4bb1b1f6b7c2d58a6820a6ba1068558696b047b618a4da547ddee7091a. 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/4GkXcqzQWNKV747o97jlYJ.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/4GkXcqzQWNKV747o97jlYJ.
Hiphopowy Raport z Osiedla w Najlepszym Wykonaniu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298920183ea492e2a2d2f90c15e3bbe3e7dc56696e10aebf13ba961fda1f8296. 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/7zWz3sraaa64mjYc7sKFsa.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/7zWz3sraaa64mjYc7sKFsa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499c972be36c1d109df0f1806179a58b938cb61ff92b5ee51aedb62d79e894c. 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/0EAXG08PAmYMkFjt94Gjb5.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/0EAXG08PAmYMkFjt94Gjb5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907b8106d31dd12e8b126757c307d03e4644e2abc02759bdff8d189a19829c1e. 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/3Xogund0nAtYfxjn2yW400.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/3Xogund0nAtYfxjn2yW400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462eeb066a3c0ff5b6ff16bb2a7dc838a7b20e91cb736f5d86b804ab6b158f15. 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/14hExYxWExDoIjNsRwroA9.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/14hExYxWExDoIjNsRwroA9.
{"copyright_id":"0x821c8861c390e44cad05e5a1aacec5cd150cb2ba9cec98473ceb34e63424ec32","isrc":"PLA552401164","name":"Z Miłości do Nienawiści","registered_at":"2026-06-07T21:31:44Z","spotify_id":"7ixzMvLhedYQEO8fUZ625s","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821c8861c390e44cad05e5a1aacec5cd150cb2ba9cec98473ceb34e63424ec32. 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/7ixzMvLhedYQEO8fUZ625s.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/7ixzMvLhedYQEO8fUZ625s.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3675ae26cd9ee7e65ba7465cc06849a3d8a1fd6a3ec4bb3587da47d12b095658. 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/7adLv17r4fzuc1wHdAz3VC.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/7adLv17r4fzuc1wHdAz3VC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa421350503cd6821250b3fbbcd94046ef37351352e79f0a5cd871ef448c902f8. 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/21YPfYNq2p76aVSdUDfCTv.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/21YPfYNq2p76aVSdUDfCTv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601c5df3da0e92f42305af87c324bd612845d67388425038a4a342d16f8fb605. 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/3zU4PaqwduBiBwGalY7udt.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/3zU4PaqwduBiBwGalY7udt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fe38023592e009bcd0f5a2e18decfa997937b8c079d080fd3804edf5656858. 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/6nh7XM17KX8chHC1DiabbV.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/6nh7XM17KX8chHC1DiabbV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95d05467d36f9ba5dfbd1428f29b02d2d3b04398c3a85a8bd244a0f47fb5d77. 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/5KWgXV5AAsBntVDuWhyRYq.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/5KWgXV5AAsBntVDuWhyRYq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499c972be36c1d109df0f1806179a58b938cb61ff92b5ee51aedb62d79e894c. 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/6Tk5ToLLTr6BK8ZA9L2oG8.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/6Tk5ToLLTr6BK8ZA9L2oG8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601c5df3da0e92f42305af87c324bd612845d67388425038a4a342d16f8fb605. 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/5DhwKB9Za72M86qzseIzks.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/5DhwKB9Za72M86qzseIzks.