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 0xe7936e719d66ea72b340aaf438794d3f4bb4bcfbd7b1d80afa0690b6459a0506. 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/cc860a9c-1d34-4ccc-9ce9-164c1ecc87cd.json and https://artists.proofprofile.net/proofs/artist/cc860a9c-1d34-4ccc-9ce9-164c1ecc87cd.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 0x1a562a9e6169e4848462411683d623fa848adc77455f735862ac2ad1561cb759. 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/3CtMkoAEwv90bvt4305Yq2.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/3CtMkoAEwv90bvt4305Yq2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505fc159656e9d162849ccd1df7a78ba188d0559a56864e3be2c09359e1a85cb. 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/4fkH6jFpG1kmkKW8B4W5mL.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/4fkH6jFpG1kmkKW8B4W5mL.
{"copyright_id":"0xf0d550e6f10b304d80bd347a1456ec0d774a3e34d1d19ff977f1413dbe3feb89","isrc":"USA2P2034445","name":"Cruel Intentions","registered_at":"2026-06-08T04:53:09Z","spotify_id":"28UxFbGQgPr34LwE6lJOtc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d550e6f10b304d80bd347a1456ec0d774a3e34d1d19ff977f1413dbe3feb89. 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/28UxFbGQgPr34LwE6lJOtc.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/28UxFbGQgPr34LwE6lJOtc.
{"copyright_id":"0x290eff8bef71248e88ebfd54c6a49ab3b59eeb11feaa5c63dcae83d12d65f28d","isrc":"USA2P2034446","name":"I Know","registered_at":"2026-06-18T04:14:39Z","spotify_id":"43FD3ksVtcpiiQClDw3vyX","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290eff8bef71248e88ebfd54c6a49ab3b59eeb11feaa5c63dcae83d12d65f28d. 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/43FD3ksVtcpiiQClDw3vyX.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/43FD3ksVtcpiiQClDw3vyX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17297b52dc085182b2f267fde2ff2c25acfb05bd93d26b72963f203b8077538. 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/40r4iweUxwCMUywVwBPgXr.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/40r4iweUxwCMUywVwBPgXr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684fcd9c4988e307f98c83a51fa730a22bf2bec663334ac59bf1e1020ef5838b. 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/4oBfZs9LQ6b3XMp7geQ9VI.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/4oBfZs9LQ6b3XMp7geQ9VI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13ba3ddfe6df298696423d4f62a75c885453e8cfb8b6db561538605686caa21. 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/5fu5GqYLVpl2ctuDd54YMz.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/5fu5GqYLVpl2ctuDd54YMz.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95052f4619f4900c30c3b65e5de4085b4022bbd710e2767aef432166c6b9f09a. 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/2hNtBgAh1edLwlXBfNGEmm.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/2hNtBgAh1edLwlXBfNGEmm.