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 0x65c91d81654700a76f5257ad30322eeba35c7a6ecf2cced5aaea4bf863bd640a. 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/4fc1aa49-bc8e-4247-a61f-6fe30ebf9345.json and https://artists.proofprofile.net/proofs/artist/4fc1aa49-bc8e-4247-a61f-6fe30ebf9345.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xd72f145a80720c9ebf3441188cbc9e493bb757f8b222fd1a2c87ffcda8a889c2","isrc":"USSM11708477","name":"Late Night","registered_at":"2026-06-28T23:02:43Z","spotify_id":"6VAKguWvojpC1dJ7URBxVb","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 0xd72f145a80720c9ebf3441188cbc9e493bb757f8b222fd1a2c87ffcda8a889c2. 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/6VAKguWvojpC1dJ7URBxVb.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/6VAKguWvojpC1dJ7URBxVb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9671bb03f70a01a0911c2407a6fd598256daff4d0d0527a48b0ab97224ff72. 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/3nPjP2ChMyflSiqF7ncsnM.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/3nPjP2ChMyflSiqF7ncsnM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b3727f9c328908c13177aa4a39b246e2dc6bc0050a0c23369f7e5e46359627. 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/6vXzeZQmhOF8V1wwQaVzSA.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/6vXzeZQmhOF8V1wwQaVzSA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2550cf2bd586c7a1a0bf5e93fda81768568f756595958358b895f76a00136cd8. 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/3Z8GTtZcEkDiJzbdcFzr4F.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/3Z8GTtZcEkDiJzbdcFzr4F.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66571441b9a828d32f4d9271c4cb701572732a129d461304617cba3ead539547. 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/4qmFye1CG4d1MmX6DYozG2.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/4qmFye1CG4d1MmX6DYozG2.
Friends (1994) - Live from the Graveyard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafae36d8d6f2d7c18bc0f9b74acea1895759ebb584587e775a3ac3cc653cf7de. 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/6d28iVuvuv1JNCNMbEKE0e.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/6d28iVuvuv1JNCNMbEKE0e.
Comfort (feat. Chuck Inglish & Jez Dior)
{"copyright_id":"0x52e847acd3a0177c3fd830ceffa93d8e19d6d032631cb6d519c3bf393fc2ac1b","isrc":"TCADC1767321","name":"Comfort (feat. Chuck Inglish & Jez Dior)","registered_at":"2026-06-19T08:33:20Z","spotify_id":"1iBnXLqWMPv2MSKLgWY4gl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e847acd3a0177c3fd830ceffa93d8e19d6d032631cb6d519c3bf393fc2ac1b. 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/1iBnXLqWMPv2MSKLgWY4gl.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/1iBnXLqWMPv2MSKLgWY4gl.