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 0x3f25f2275bb5f880c05ce107ae5b9563f5d1f7754b5be460f763bc09e8aa007a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd2c19b6-da6e-4dbe-99e2-5259bd9f85b9.json and https://artists.proofprofile.net/proofs/artist/bd2c19b6-da6e-4dbe-99e2-5259bd9f85b9.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 0x57af0dc80234ff019186efbdd69329e0c4fdf0a02d3408eb7127d215c6c51552. 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/24CeaRaJHiMKFAVZTCu8Y0.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/24CeaRaJHiMKFAVZTCu8Y0.
{"copyright_id":"0x57af0dc80234ff019186efbdd69329e0c4fdf0a02d3408eb7127d215c6c51552","isrc":"USUR10300762","name":"Sun Doesn't Rise","registered_at":"2026-06-01T21:48:04Z","spotify_id":"3zfcurCEuy0VEsOULjxOGx","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af0dc80234ff019186efbdd69329e0c4fdf0a02d3408eb7127d215c6c51552. 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/3zfcurCEuy0VEsOULjxOGx.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/3zfcurCEuy0VEsOULjxOGx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ab1dc14b88d1b8711609317213b925279911e89dedfb96b441073cd80bea45. 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/17wU7rGPLbu6zHoLsgitDT.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/17wU7rGPLbu6zHoLsgitDT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af0dc80234ff019186efbdd69329e0c4fdf0a02d3408eb7127d215c6c51552. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2bHuyjXKJ1UGwdGK6CT9VH.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/2bHuyjXKJ1UGwdGK6CT9VH.
{"copyright_id":"0x57af0dc80234ff019186efbdd69329e0c4fdf0a02d3408eb7127d215c6c51552","isrc":"USUR10300762","name":"Sun Doesn't Rise","registered_at":"2026-06-01T21:48:04Z","spotify_id":"5kzuOEIrMQLVLRAAIJZGpS","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57af0dc80234ff019186efbdd69329e0c4fdf0a02d3408eb7127d215c6c51552. 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/5kzuOEIrMQLVLRAAIJZGpS.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/5kzuOEIrMQLVLRAAIJZGpS.
Saw VI (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a10c8a7acc876a23dbddc2109e7dc59e619039453c085b5766336e0492fad4. 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/6qVJNBFkx2WlKmRfgB5G5V.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/6qVJNBFkx2WlKmRfgB5G5V.