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 0x3b8567c7191b602f6790487f8af2953f9521fdbf78f620e27c82f61670b59f18. 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/fc50812a-272d-4942-82c8-1ea956147511.json and https://artists.proofprofile.net/proofs/artist/fc50812a-272d-4942-82c8-1ea956147511.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x7f09c036c77d50b7e79caa40dd7f7d3d4da3e5cb496150085b30deebe65d0e31","isrc":"DEZC62336793","name":"Vom up zum down","registered_at":"2026-06-21T09:43:37Z","spotify_id":"2W5ZkdqfU1G59zKS4CRMjj","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 0x7f09c036c77d50b7e79caa40dd7f7d3d4da3e5cb496150085b30deebe65d0e31. 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/2W5ZkdqfU1G59zKS4CRMjj.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/2W5ZkdqfU1G59zKS4CRMjj.
{"copyright_id":"0x17c2515a600144a0f7decd2e230fc7442c33f14fbd2b3f4d7fcf73c5c23753d2","isrc":"DEZC62335192","name":"Du weißt es","registered_at":"2026-06-11T18:14:34Z","spotify_id":"3WJrsYFKYlKdVnvQjchWl8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c2515a600144a0f7decd2e230fc7442c33f14fbd2b3f4d7fcf73c5c23753d2. 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/3WJrsYFKYlKdVnvQjchWl8.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/3WJrsYFKYlKdVnvQjchWl8.
{"copyright_id":"0x093d52c0d0ec164c730d455de0a8ccdff44fea49c1eaa1b6963b8d0edb15e82f","isrc":"DEZC62328091","name":"Militante Veganerin","registered_at":"2026-06-18T05:40:56Z","spotify_id":"3rEgyJMjZU95y079II2ns9","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d52c0d0ec164c730d455de0a8ccdff44fea49c1eaa1b6963b8d0edb15e82f. 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/3rEgyJMjZU95y079II2ns9.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/3rEgyJMjZU95y079II2ns9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cc5aea8ad81964ea2bf0f9e597d033c82547a3840a87ac5266c649dbe37ed8. 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/2xG00lilZj1xa1i98VoZyJ.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/2xG00lilZj1xa1i98VoZyJ.
{"copyright_id":"0x5f7810369ce6613083ba2bb331bf25ce911b1e8fc59a105d92835c6270a79e6a","isrc":"DEZC62357235","name":"Gestresst ohne Grund","registered_at":"2026-06-29T14:33:11Z","spotify_id":"6HHopPBLuibr7MPceXh9jn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7810369ce6613083ba2bb331bf25ce911b1e8fc59a105d92835c6270a79e6a. 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/6HHopPBLuibr7MPceXh9jn.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/6HHopPBLuibr7MPceXh9jn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2d98caafdb3a0cdb3925a0b0d92cb5bee985a5a453e18baca061d919f1e4ca. 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/0ttCN7K3dJ2cvuEmF42x8T.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/0ttCN7K3dJ2cvuEmF42x8T.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06e232dd78f3e36611c775d91f90aca9d3a607e0512ca427684e9b19416b87b. 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/4dxZyRxFQwlIFNMFX88pkL.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/4dxZyRxFQwlIFNMFX88pkL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6c0779b6789e81fe381a5f3e7c56629cfbaa25a4341c2cb53708eb0f419af9. 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/6KrK7Kq3g6xpgbR1fgtQ6V.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/6KrK7Kq3g6xpgbR1fgtQ6V.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c2515a600144a0f7decd2e230fc7442c33f14fbd2b3f4d7fcf73c5c23753d2. 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/025uOkEbvmeXnZjVs6tatk.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/025uOkEbvmeXnZjVs6tatk.
{"copyright_id":"0x093d52c0d0ec164c730d455de0a8ccdff44fea49c1eaa1b6963b8d0edb15e82f","isrc":"DEZC62328091","name":"Militante Veganerin","registered_at":"2026-06-18T05:40:56Z","spotify_id":"5puqg3WW4iqarKpv1kwScc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d52c0d0ec164c730d455de0a8ccdff44fea49c1eaa1b6963b8d0edb15e82f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5puqg3WW4iqarKpv1kwScc.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/5puqg3WW4iqarKpv1kwScc.
{"copyright_id":"0x093d52c0d0ec164c730d455de0a8ccdff44fea49c1eaa1b6963b8d0edb15e82f","isrc":"DEZC62328091","name":"Militante Veganerin","registered_at":"2026-06-18T05:40:56Z","spotify_id":"6JMFUzFulv5fyeHn41VEgG","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d52c0d0ec164c730d455de0a8ccdff44fea49c1eaa1b6963b8d0edb15e82f. 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/6JMFUzFulv5fyeHn41VEgG.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/6JMFUzFulv5fyeHn41VEgG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2d98caafdb3a0cdb3925a0b0d92cb5bee985a5a453e18baca061d919f1e4ca. 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/3O5d9mxZy0eRh6qSXv87Bo.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/3O5d9mxZy0eRh6qSXv87Bo.