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 0x4c1a47c1f4c77c15cf911c96da0330ed9f7ac2bb86d26c05e98c918823736f3e. 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/f8a02941-f41e-42b4-a08f-7835a2241f4d.json and https://artists.proofprofile.net/proofs/artist/f8a02941-f41e-42b4-a08f-7835a2241f4d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0xb71ae49312a2f3582c47029c5be4610b1423ad7716b9c33fba421c24a68bc0ec","isrc":"NZBG09200002","name":"Here Comes the Supergroove","registered_at":"2026-06-20T05:53:47Z","spotify_id":"1MOsm3WLCtKCojVJFpiuQR","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 0xb71ae49312a2f3582c47029c5be4610b1423ad7716b9c33fba421c24a68bc0ec. 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/1MOsm3WLCtKCojVJFpiuQR.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/1MOsm3WLCtKCojVJFpiuQR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13972ba27e4bbf0d6af1c46aba50f59975a55bd7465f427b59346e198b163133. 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/7pNXommZ0yVnNV58khQiBg.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/7pNXommZ0yVnNV58khQiBg.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1142a67af52779baa683e88514ad5d09e75bc8df33f1633d21db7d15862f9e2b. 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/6lggBLfA1a5Q6dE2qnpvZm.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/6lggBLfA1a5Q6dE2qnpvZm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46470b6194db730532510585efbb961c33f86d17254de2e1b79a3a574a43666. 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/3k17teB1r7kX2zBTHP4UhC.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/3k17teB1r7kX2zBTHP4UhC.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036d221200c2c09d0e590cefcd63c520bcc37e978bf091dc706406f64b8a2229. 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/7qDcenxS5HZMOygE6KnmC1.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/7qDcenxS5HZMOygE6KnmC1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b6b6158d2ab07e97c38a7e093d05c2c17f15bfbd7e049b2269142d0018c5f3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2Xbm3ew6eyThNXORH51ngV.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/2Xbm3ew6eyThNXORH51ngV.
{"copyright_id":"0x6df87937a4cc386cdafd073f0a4919391f6e00ed33caf3b76ebad3683a51e5ac","isrc":"NZBG09400013","name":"Can't Get Enough","registered_at":"2026-06-05T06:58:46Z","spotify_id":"6OHZ4qXzbRtasiQhGKjPyo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df87937a4cc386cdafd073f0a4919391f6e00ed33caf3b76ebad3683a51e5ac. 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/6OHZ4qXzbRtasiQhGKjPyo.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/6OHZ4qXzbRtasiQhGKjPyo.
{"copyright_id":"0xbc98609d885ae49266e334bae75e53a7fa9a84add91b1576b95f7d5513cebcb9","isrc":"NZBG09400006","name":"Sitting Inside My Head","registered_at":"2026-06-08T03:08:48Z","spotify_id":"3T0iYAHLp0mAATN8dmHMnm","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc98609d885ae49266e334bae75e53a7fa9a84add91b1576b95f7d5513cebcb9. 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/3T0iYAHLp0mAATN8dmHMnm.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/3T0iYAHLp0mAATN8dmHMnm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5325fd3d6f56f2bb30c681a682821dfb15c6639c5963f0c4eef241618544a8. 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/4M5oBLeSkmeluXfbWF0Clp.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/4M5oBLeSkmeluXfbWF0Clp.
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