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 0xad7885e07e97a72fcb00b6d2c2c04978d0bf264292ce2beae8fd687e11dd6898. 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/f92d4637-eb61-41e9-b9a0-d7a63b412945.json and https://artists.proofprofile.net/proofs/artist/f92d4637-eb61-41e9-b9a0-d7a63b412945.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x4e81b4ba8b482d0c1c3def29b53b9c7836e0f7ffe8032656e6dde94ff0e77ed2","isrc":"QM42K2013971","name":"we can hav a party!!","registered_at":"2026-06-27T18:15:17Z","spotify_id":"7g80FaYeEMyRKUf00TASTc","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 0x4e81b4ba8b482d0c1c3def29b53b9c7836e0f7ffe8032656e6dde94ff0e77ed2. 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/7g80FaYeEMyRKUf00TASTc.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/7g80FaYeEMyRKUf00TASTc.
{"copyright_id":"0xb769e5760b5d9314f71463732bdf97fadd395f895d902e4ebf91c5ab0db39e72","isrc":"QZF8N2017930","name":"something that i said","registered_at":"2026-06-26T01:57:59Z","spotify_id":"1lZ6ZFONzT44VuvVFYqmgC","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb769e5760b5d9314f71463732bdf97fadd395f895d902e4ebf91c5ab0db39e72. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1lZ6ZFONzT44VuvVFYqmgC.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/1lZ6ZFONzT44VuvVFYqmgC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8591c063c143543b41ea1215aca07bda99bd77f4c48bb1a7ccdf1d9a832e5. 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/4yW98jsU14f9JWls8uhWAC.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/4yW98jsU14f9JWls8uhWAC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d741914b1268c76c799b3eda8481779476dc17a14f38a6f8f059f92748c43c. 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/24W1Qz9T4KgIh6xNjlk6Ts.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/24W1Qz9T4KgIh6xNjlk6Ts.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb88fec2b29a446c3af4c62e16aae91f3fa4023ff510c05d4a184976075fa9e. 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/4JzfYqbSNcVswXesVqZRjD.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/4JzfYqbSNcVswXesVqZRjD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80acc0984367c3c91d537919db6447a53570ff6b01a455d54707be4945e7a21b. 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/2Mibb9Vhpr0tIsehZpzs7o.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/2Mibb9Vhpr0tIsehZpzs7o.