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 0x7d05b54c620d4c4b49bff2a6955ced2902794784a8c104f6f026511d66fa2385. 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/62e87848-41c2-486c-917c-518d6db243e7.json and https://artists.proofprofile.net/proofs/artist/62e87848-41c2-486c-917c-518d6db243e7.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 0x940eadc0e4ec85c97b9c78b151a507826cbf12d067775afa6fdeae2f93d45037. 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/1Bw7Yr8aaZi34ca3Da2yah.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/1Bw7Yr8aaZi34ca3Da2yah.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d7919b2d8171e9395edd14bcea414ffba52531492407f86095bfe9ef136bf7. 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/7pFPWLGn9Ifiq4UMd1wsvl.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/7pFPWLGn9Ifiq4UMd1wsvl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb92c9c36b7a78e0b0ce8bb6825bf9931d176a4194fd405e8124949f6474bb8. 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/1kjgmj7VxUtNnUhqLGgmwb.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/1kjgmj7VxUtNnUhqLGgmwb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cca50b9216c46e37f6d43fbebfa3cbac10502d5586a67e4152f7add7d57561. 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/07ShpStFJxonIqYjj4PSeH.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/07ShpStFJxonIqYjj4PSeH.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6db79576d66d158bc47a5729d8e43a06c02602c47e238daa8cfb761627fad9a. 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/1XalPLijdy4Z6vAj6uqjt6.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/1XalPLijdy4Z6vAj6uqjt6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a191f2fb24cb7d3905bf5587a03b713948d2b676f7dfc38b713d7c499d0fcf1. 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/0XDWjgZoWSg09NTsdIBNhK.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/0XDWjgZoWSg09NTsdIBNhK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d63277001a63c003e67a346429ddd81f5838a28472bf35a89277a830408ffa. 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/6uIBQilyKFG8Ir4u7HGzmv.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/6uIBQilyKFG8Ir4u7HGzmv.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15948e4c4f6001ed3f9af7e21ef635940cfd561076a9d5f0f9744982849df222. 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/1Ajbiv85RcRSP3jBVfh92Y.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/1Ajbiv85RcRSP3jBVfh92Y.
{"copyright_id":"0x3a7e3d1666ee22fbbc4a97a8be7eab72ef7af6c1ef4ec97fc406b1446ad78752","isrc":"QZK6L2463883","name":"ROZJEBEJ KLUB","registered_at":"2026-06-07T16:17:59Z","spotify_id":"1R15pv9uVdcjEK0ejjdLwN","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7e3d1666ee22fbbc4a97a8be7eab72ef7af6c1ef4ec97fc406b1446ad78752. 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/1R15pv9uVdcjEK0ejjdLwN.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/1R15pv9uVdcjEK0ejjdLwN.
{"copyright_id":"0xdcf97bcb70e8c09e826ec3792a3ce718833b9afe7938cae4a8e2fa1ca8bd13d6","isrc":"QZK6L2463884","name":"ZAPÍNEJ SVĚTLA","registered_at":"2026-06-18T23:52:27Z","spotify_id":"3vFeLiDoY4ad81RmsnhDTu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf97bcb70e8c09e826ec3792a3ce718833b9afe7938cae4a8e2fa1ca8bd13d6. 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/3vFeLiDoY4ad81RmsnhDTu.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/3vFeLiDoY4ad81RmsnhDTu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34cc5442b7f1befab6dbadfd6d4f499821e032b9778014f09c9172be122e05. 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/3LQMg8rvsbrmQCbXrf2ZjY.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/3LQMg8rvsbrmQCbXrf2ZjY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e3d4a10009191f4c89616d608e2b3ed646bf37304baca488877d599163c424. 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/6dC8Q2d9wxMZlccnTZEZ7w.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/6dC8Q2d9wxMZlccnTZEZ7w.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb0da508b2f2518677e7ad97ea6449e6eb20e8f2a8f1263c0cdbfe14f84a91. 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/3f7wX0regkRVu1QULGsyVv.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/3f7wX0regkRVu1QULGsyVv.
{"copyright_id":"0xc0a8c0eb00684fc9ecf4b5e2dc7d495e3fce8084f220feeb08d0dc3e12af0000","isrc":"CZUM72400451","name":"30 Minut","registered_at":"2026-06-08T05:10:20Z","spotify_id":"1lflvh8PjIgk3YrDEr58YY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a8c0eb00684fc9ecf4b5e2dc7d495e3fce8084f220feeb08d0dc3e12af0000. 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/1lflvh8PjIgk3YrDEr58YY.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/1lflvh8PjIgk3YrDEr58YY.