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 0xc2343f283bfb2d0bb1e7bce95b03c9cf0b90a069f3153aea071129a4445e80b9. 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/8ea5c4e8-c0a7-46fa-8463-363006839f8f.json and https://artists.proofprofile.net/proofs/artist/8ea5c4e8-c0a7-46fa-8463-363006839f8f.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 0x0a3d2e43e67416b1afec1662a8c194598cd85dd26f7b08814a2e212d5a9d47f6. 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/2Hklq3sJemmVdm6vRlVDAC.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/2Hklq3sJemmVdm6vRlVDAC.
{"copyright_id":"0xdd064116d1d62a50bc0c6dc39d7466ebf406da2d361cf2d5dea133658810cc85","isrc":"QZFYY2319589","name":"Make Believe","registered_at":"2026-06-25T14:35:30Z","spotify_id":"1rmLFSdmR7i6l6YXomtBfq","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd064116d1d62a50bc0c6dc39d7466ebf406da2d361cf2d5dea133658810cc85. 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/1rmLFSdmR7i6l6YXomtBfq.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/1rmLFSdmR7i6l6YXomtBfq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a0f66f2ac4e2ac2379f9e70aafe7f75cbae9b169a3ba306abe9a255edf112. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6qjGHCiXKZABZDsmRGnlVh.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/6qjGHCiXKZABZDsmRGnlVh.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7393735cec438d54e7965755060288bd650368151a380853aaca3eff6e66b1. 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/13BrG4dRuhHxfixj9Y7zW3.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/13BrG4dRuhHxfixj9Y7zW3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308c057c1dbdc1e89a125094ca4a0b4e6d065b4978de7932af1d073d887b8141. 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/6BddvI0qsl90CCRmXeSkhW.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/6BddvI0qsl90CCRmXeSkhW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951079d71c2bd7caedf4cbb6594561f83d97e9382ec0a3a76b7c068eeaa8a2f8. 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/4FokFm0wI8AYk2ORwTY5VH.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/4FokFm0wI8AYk2ORwTY5VH.
{"copyright_id":"0xdd064116d1d62a50bc0c6dc39d7466ebf406da2d361cf2d5dea133658810cc85","isrc":"QZFYY2319589","name":"Make Believe","registered_at":"2026-06-25T14:35:30Z","spotify_id":"3lzdL0nJGURs1s9gIozg7h","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd064116d1d62a50bc0c6dc39d7466ebf406da2d361cf2d5dea133658810cc85. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3lzdL0nJGURs1s9gIozg7h.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/3lzdL0nJGURs1s9gIozg7h.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a0f66f2ac4e2ac2379f9e70aafe7f75cbae9b169a3ba306abe9a255edf112. 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/4vwtVopp3Iq8UUCd1niOwx.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/4vwtVopp3Iq8UUCd1niOwx.