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 0xf7934666b8fb06037d16f38a031071b161cf0813ad87af3bb1fdfd523c5b8fb2. 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/5df01620-781a-4649-a251-79ec109326fa.json and https://artists.proofprofile.net/proofs/artist/5df01620-781a-4649-a251-79ec109326fa.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 0x0b0a1ed1c81956c6c3209477aced8efcf6cc14bb50e60f579bddb72c79e447e9. 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/3AWYfSike1mbbnfnzCxepQ.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/3AWYfSike1mbbnfnzCxepQ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b38e431fe603179510266ace2247d692515204135d5d368faafd5c7c6ea675. 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/77MluVeW2K1ZX4s8JqROVI.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/77MluVeW2K1ZX4s8JqROVI.
{"copyright_id":"0x7f5806193c0f40ae40e773a5b092890f1f59f697af20b773faa480b55a88ee58","isrc":"JPR562200445","name":"We never stop - DJ Shimamura Remix","registered_at":"2026-06-27T08:43:26Z","spotify_id":"4nQvDSCzwp3wpfyrxDAPD8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5806193c0f40ae40e773a5b092890f1f59f697af20b773faa480b55a88ee58. 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/4nQvDSCzwp3wpfyrxDAPD8.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/4nQvDSCzwp3wpfyrxDAPD8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258e33339bd659ed9fa8865b718f920165cd9678a2c4aa614e30c5a0dd1b745b. 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/4bhBA98pwT5DhqYdZQB64W.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/4bhBA98pwT5DhqYdZQB64W.
{"copyright_id":"0x7f5806193c0f40ae40e773a5b092890f1f59f697af20b773faa480b55a88ee58","isrc":"JPR562200445","name":"We never stop (DJ Shimamura Remix)","registered_at":"2026-06-27T08:43:26Z","spotify_id":"6F79rlu8cEQEEsDdS3bzOu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5806193c0f40ae40e773a5b092890f1f59f697af20b773faa480b55a88ee58. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6F79rlu8cEQEEsDdS3bzOu.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/6F79rlu8cEQEEsDdS3bzOu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258e33339bd659ed9fa8865b718f920165cd9678a2c4aa614e30c5a0dd1b745b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3xpHPRkFivQ6MS3jtI2dUp.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/3xpHPRkFivQ6MS3jtI2dUp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65169046fbe98fc28ab460084677723836df0ce79875830c5ce396f095c5469d. 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/4Du2XMf5CNay0oTOwfdN0L.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/4Du2XMf5CNay0oTOwfdN0L.
Photon Melodies (TAKU INOUE Remix ver. 2025)
{"copyright_id":"0x696c1ee0242df4402364a447157fcc205a24bd58f3fa019470ecaaecffea8d29","isrc":"JPR562400517","name":"Photon Melodies (TAKU INOUE Remix ver. 2025)","registered_at":"2026-06-29T08:41:06Z","spotify_id":"2bLbQ3hDfYeqlPj19b2DHs","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696c1ee0242df4402364a447157fcc205a24bd58f3fa019470ecaaecffea8d29. 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/2bLbQ3hDfYeqlPj19b2DHs.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/2bLbQ3hDfYeqlPj19b2DHs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f592a199fff8396623c8e8a90b98688159e0d50597fe6af3aeae9db1c2dc0f. 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/7mhDFhOqLcxmIJjUws54Xh.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/7mhDFhOqLcxmIJjUws54Xh.