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 0xa09225ac26ffb1909c6b70440626a63b0ef626b20f7882c1983a875bb7c056b3. 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/73ade11c-3f96-4956-acef-b70e56267adb.json and https://artists.proofprofile.net/proofs/artist/73ade11c-3f96-4956-acef-b70e56267adb.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 0x704038e93703e51bf2a27597c53be50939a419702d9058782cfa4412142610d4. 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/4OxmdJ55eYSZfSCwpCLW7b.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/4OxmdJ55eYSZfSCwpCLW7b.
{"copyright_id":"0x7a7ca8b184b76010ea55a06fbeaec6bcc981f099ee84895db9e87f79cfeb7247","isrc":"QZGLS2366959","name":"Tropa do Unlock","registered_at":"2026-06-07T20:45:19Z","spotify_id":"02OXgwzsb4jNrcUAFbI1kO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7ca8b184b76010ea55a06fbeaec6bcc981f099ee84895db9e87f79cfeb7247. 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/02OXgwzsb4jNrcUAFbI1kO.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/02OXgwzsb4jNrcUAFbI1kO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076d475bad8a73c535e4328ea23ff497f1551001519f2857a8639c89b2f44c3a. 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/2UO1u9ku7APBXLUrEW2p6W.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/2UO1u9ku7APBXLUrEW2p6W.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9cb97054bd4d265e0a7c0b37108d0acab15238e62db5d457e110096b335208. 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/6c0EmjFnf2maWAMv1htSiF.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/6c0EmjFnf2maWAMv1htSiF.
{"copyright_id":"0xd8d1c98481fd2b69fe1462f697c014b0d7a3b4232872e0e64ec12f4cb6b9fc4d","isrc":"BCENK2200019","name":"Conta Bancária","registered_at":"2026-06-10T17:34:18Z","spotify_id":"5nxCzBk3pUc9qUz0xM0B9q","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d1c98481fd2b69fe1462f697c014b0d7a3b4232872e0e64ec12f4cb6b9fc4d. 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/5nxCzBk3pUc9qUz0xM0B9q.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/5nxCzBk3pUc9qUz0xM0B9q.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1832ca070f2c8555f71521eab5ddf9d4f209e504283539b35848a285162dab4. 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/5RFnpSad2z0tBKKpCO3mBf.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/5RFnpSad2z0tBKKpCO3mBf.