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 0x403bbee0b6f4ab2fa2c035945050b424aeb1bfe157aeffd328e0043c78c70a91. 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/64d07736-21d0-49cd-8d41-a56971318aa7.json and https://artists.proofprofile.net/proofs/artist/64d07736-21d0-49cd-8d41-a56971318aa7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x51b7663eaeabbfa35ced69d3fbeac4bb248892ba0f08499f7d93a5eecdd3485c","isrc":"QZK6F2151089","name":"MY SLIME IS!","registered_at":"2026-06-09T18:03:09Z","spotify_id":"3Hi66Zn7ZS8rWjNBVWuJwg","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 0x51b7663eaeabbfa35ced69d3fbeac4bb248892ba0f08499f7d93a5eecdd3485c. 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/3Hi66Zn7ZS8rWjNBVWuJwg.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/3Hi66Zn7ZS8rWjNBVWuJwg.
{"copyright_id":"0x13b1cf5ca69d32a9ec71dfb67fa0e42c2c4dca51a75f4376b696fe153ba880b0","isrc":"QZK6F2151090","name":"BARLESS ISEKAI","registered_at":"2026-06-22T09:08:49Z","spotify_id":"0GgKB1MVbCdH7YiTKzqBUR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1cf5ca69d32a9ec71dfb67fa0e42c2c4dca51a75f4376b696fe153ba880b0. 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/0GgKB1MVbCdH7YiTKzqBUR.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/0GgKB1MVbCdH7YiTKzqBUR.
{"copyright_id":"0xa1123cc1f3622afca5a753769093f26ca3e889a4bc4cfa6841bc676edaaeece6","isrc":"QZK6L2459165","name":"Goth Bae","registered_at":"2026-06-23T10:54:44Z","spotify_id":"1JPlcxkqx5AHhkaCDdZAY9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1123cc1f3622afca5a753769093f26ca3e889a4bc4cfa6841bc676edaaeece6. 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/1JPlcxkqx5AHhkaCDdZAY9.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/1JPlcxkqx5AHhkaCDdZAY9.
{"copyright_id":"0x64db6277b68b209daeb69e074c56eb057fd5d4b466a85ac2ccbf1ee5ea46e0c9","isrc":"QZFYZ2316340","name":"Chainsaw Man Cypher: Public Safety","registered_at":"2026-06-23T13:38:01Z","spotify_id":"0HfMuP2EIk4nJqoW99m6ib","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64db6277b68b209daeb69e074c56eb057fd5d4b466a85ac2ccbf1ee5ea46e0c9. 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/0HfMuP2EIk4nJqoW99m6ib.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/0HfMuP2EIk4nJqoW99m6ib.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02948875d883111da647e1146bd8ec88bab8a814e4f9e970d500d855c92b5227. 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/2J8OIev9TSZpzudkq8alrn.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/2J8OIev9TSZpzudkq8alrn.