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 0x436a90f95ba00b91e00732abd6815b1404ba1f06b8449000234d9e5ba91ce30e. 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/cad38dbf-7e1e-4651-aab1-e3c926ebaa9b.json and https://artists.proofprofile.net/proofs/artist/cad38dbf-7e1e-4651-aab1-e3c926ebaa9b.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 0x86e954b28940c17912c52846ade5bc1b01b2a5fe4359c45240d56a668e8367c9. 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/5i1296P4AjoOztZ3X9foTp.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/5i1296P4AjoOztZ3X9foTp.
{"copyright_id":"0x2f9de769597fb01a8a08a3db56269c1be012d0c9465914cd2fe1bd98a93ebed0","isrc":"QMDA62103082","name":"Wash Clothes","registered_at":"2026-06-29T05:19:22Z","spotify_id":"5IU8k1DMKjSUPU5uChBCvo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9de769597fb01a8a08a3db56269c1be012d0c9465914cd2fe1bd98a93ebed0. 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/5IU8k1DMKjSUPU5uChBCvo.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/5IU8k1DMKjSUPU5uChBCvo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e954b28940c17912c52846ade5bc1b01b2a5fe4359c45240d56a668e8367c9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7Kq5hB4Ms3KjxE4lWw840C.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/7Kq5hB4Ms3KjxE4lWw840C.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd483c88ab3691dd72c0ae11471e4726c178dd101fc3994db1551d430e64c546. 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/4As0M5CRnHpN2HP80JjYH7.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/4As0M5CRnHpN2HP80JjYH7.
{"copyright_id":"0xcc20e6aca78ceeff24ef587af362fd13c8eba459330fcb36fafef43f1f7f1513","isrc":"QMFME2328698","name":"Shoulder Shift - Remix","registered_at":"2026-06-07T15:15:29Z","spotify_id":"73U7aAF8aLh9mtthwtsLvT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc20e6aca78ceeff24ef587af362fd13c8eba459330fcb36fafef43f1f7f1513. 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/73U7aAF8aLh9mtthwtsLvT.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/73U7aAF8aLh9mtthwtsLvT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01757e1319e998a233539384d7bd12c81df03430241913f160f863dfb196c5bd. 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/5DWy34gQ8PQQ6InAY7ejMx.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/5DWy34gQ8PQQ6InAY7ejMx.