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 0xf56621e6abd55de5f483e2b2174670cf23d565b19652b68549b49bb57532a5ec. 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/d2352068-4b3c-4ad8-8294-5c07afb10d22.json and https://artists.proofprofile.net/proofs/artist/d2352068-4b3c-4ad8-8294-5c07afb10d22.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x4253f49c536cb3eca4b31ba3676157ce2deb077e15fae2cd3a5790d68269fdcf","isrc":"QZFZ22091695","name":"Losing It","registered_at":"2026-06-29T07:29:29Z","spotify_id":"6SUrKtP3RGnhfo4AgQgW0H","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 0x4253f49c536cb3eca4b31ba3676157ce2deb077e15fae2cd3a5790d68269fdcf. 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/6SUrKtP3RGnhfo4AgQgW0H.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/6SUrKtP3RGnhfo4AgQgW0H.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d3bd284a89261e88559a1ba40692f2d46c8b6173e7e3f83ae5c50f91a2a0dd. 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/3AFMMuzjr7HOkpWHLtxp0p.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/3AFMMuzjr7HOkpWHLtxp0p.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173cf36c971ec3cf97317fed6f5f148a70d01b073a256fa8b15228056acdd51e. 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/52bHhcbR3eAHP3DEnnQWPl.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/52bHhcbR3eAHP3DEnnQWPl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8883529d0fbfd131072aa0bcdf9842326d9da7167e27a42e6c0adced2ba31a86. 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/6sTJxjxTuWfs0agqDZHCkV.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/6sTJxjxTuWfs0agqDZHCkV.