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 0x94d56a490eea9ea4dc7defbd74204b83c829ca18367fb89d0b39a2502c813b25. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61f13797-6958-4acf-8c69-5bca0573a6f0.json and https://artists.proofprofile.net/proofs/artist/61f13797-6958-4acf-8c69-5bca0573a6f0.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 0xce258d8898b5931b328e580c14316934bf22374b08e555b9d484e967f4f52caf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2eKDv5YF61GLYd6dYZScX8.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/2eKDv5YF61GLYd6dYZScX8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40293941c6bf9a0dfd20c5763cac7cb6eee1469cdebfdb70c9709625f9226c1. 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/4w9NfJaHk47FRSfpvjO7Dw.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/4w9NfJaHk47FRSfpvjO7Dw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845270e843bceb4b85a043304d73b5d3575a49a31fdf73ac8ef0bba18e858725. 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/3bUul2ZcE0FHN8J1EK23fd.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/3bUul2ZcE0FHN8J1EK23fd.
{"copyright_id":"0xc31b5acb37d534a201a541ba0215648150e360c464a43e58f50638c94a0ae9cd","isrc":"CACWV1771811","name":"Die Verskoning (The Apology)","registered_at":"2026-06-26T05:44:13Z","spotify_id":"7gmtba1irW1Nm60qk7XNbR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31b5acb37d534a201a541ba0215648150e360c464a43e58f50638c94a0ae9cd. 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/7gmtba1irW1Nm60qk7XNbR.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/7gmtba1irW1Nm60qk7XNbR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c82de57f724cb1aee241ee05da9db144944b839dccec03293f2ac5ad1bbfb3. 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/05dFi7rDDGCY5chk2nAczl.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/05dFi7rDDGCY5chk2nAczl.
The Last Supper At The Regal Wetherspoon
{"copyright_id":"0x712f49600dad00318f10828b403178a5e8ef83c988faa1688158c2c20450f7d0","isrc":"UK3H21300099","name":"The Last Supper At The Regal Wetherspoon","registered_at":"2026-06-20T14:31:56Z","spotify_id":"6PIJmFCCmegoMhN8A5IeTu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712f49600dad00318f10828b403178a5e8ef83c988faa1688158c2c20450f7d0. 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/6PIJmFCCmegoMhN8A5IeTu.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/6PIJmFCCmegoMhN8A5IeTu.
{"copyright_id":"0x303989134eb58552af306f33341c442f9a4006ab8c2aacb06ed2d6e8d75eca2f","isrc":"UK3H21300100","name":"Redemption, On The Road To Damascus","registered_at":"2026-06-27T20:56:34Z","spotify_id":"6RYhTZMVEkBeDAsf77TNlR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303989134eb58552af306f33341c442f9a4006ab8c2aacb06ed2d6e8d75eca2f. 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/6RYhTZMVEkBeDAsf77TNlR.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/6RYhTZMVEkBeDAsf77TNlR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a0ffa680aa5f5e9175939f4f1e7ee5fb4fc0a8da94ad9f12fb7dada5de4922. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5WItes8hdbViIkPJGbD0lx.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/5WItes8hdbViIkPJGbD0lx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aac2916831347b6c69d849430933e69d6e8f70934c93ad90c4dadc1949b838. 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/2A5JM5EOPM7Yggk8oWuQBh.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/2A5JM5EOPM7Yggk8oWuQBh.
{"copyright_id":"0xa137bcf2cf9248b2eeb476a9e91835d4549e29bd876acf7d4acdbd9c1bb131e8","isrc":"CACWV2313937","name":"The Wheel","registered_at":"2026-06-07T22:13:39Z","spotify_id":"7qC4rKii8w8tkfjDk46TCA","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa137bcf2cf9248b2eeb476a9e91835d4549e29bd876acf7d4acdbd9c1bb131e8. 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/7qC4rKii8w8tkfjDk46TCA.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/7qC4rKii8w8tkfjDk46TCA.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc786d27c449bca7f6fbf6e7b15104018d9ee72fd09a9ea8d3dccaccc3f85e158. 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/35pTKpJlXTySyP9oH0Cj24.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/35pTKpJlXTySyP9oH0Cj24.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59660e6ab0e86f714b0210bc4fd5479a26cb76e4b5102652abba0696c6f8e46. 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/66U7274Oapr417BNqeQLoS.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/66U7274Oapr417BNqeQLoS.
{"copyright_id":"0x0a0942f6313f579532b9facf7b770e55a9b330ec4a7ab7a65f462cfcaf6fc3d4","isrc":"UK6822400171","name":"Shepherd's Carol","registered_at":"2026-06-07T22:21:25Z","spotify_id":"5mQTjVSDJyi6yG6VynGyUo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0942f6313f579532b9facf7b770e55a9b330ec4a7ab7a65f462cfcaf6fc3d4. 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/5mQTjVSDJyi6yG6VynGyUo.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/5mQTjVSDJyi6yG6VynGyUo.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134be7648114769e7fc2a3e378b81322ea97e9d76921675d1ac26eca4fa1021. 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/4l3BIJtMIFAFtFdAIExAV7.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/4l3BIJtMIFAFtFdAIExAV7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2485d334fb6464ec8b5e8b76c06f44ff01f8b00a674c071c3776d186bc6c4f1a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5YGWtx6RcqEFdC1fSod0K6.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/5YGWtx6RcqEFdC1fSod0K6.
{"copyright_id":"0x0a0942f6313f579532b9facf7b770e55a9b330ec4a7ab7a65f462cfcaf6fc3d4","isrc":"UK6822400171","name":"Shepherd's Carol","registered_at":"2026-06-07T22:21:25Z","spotify_id":"1J2OTTZmDPm0Klo43pMzsX","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0942f6313f579532b9facf7b770e55a9b330ec4a7ab7a65f462cfcaf6fc3d4. 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/1J2OTTZmDPm0Klo43pMzsX.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/1J2OTTZmDPm0Klo43pMzsX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134be7648114769e7fc2a3e378b81322ea97e9d76921675d1ac26eca4fa1021. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6FrW7htz75AtmZJZk59BEv.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/6FrW7htz75AtmZJZk59BEv.
{"copyright_id":"0xa137bcf2cf9248b2eeb476a9e91835d4549e29bd876acf7d4acdbd9c1bb131e8","isrc":"CACWV2313937","name":"The Wheel","registered_at":"2026-06-07T22:13:39Z","spotify_id":"03YZtt5A5NAN8oaIiQfeBu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa137bcf2cf9248b2eeb476a9e91835d4549e29bd876acf7d4acdbd9c1bb131e8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/03YZtt5A5NAN8oaIiQfeBu.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/03YZtt5A5NAN8oaIiQfeBu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc786d27c449bca7f6fbf6e7b15104018d9ee72fd09a9ea8d3dccaccc3f85e158. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0DTsMXJRentoe0Mzawg3HW.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/0DTsMXJRentoe0Mzawg3HW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2485d334fb6464ec8b5e8b76c06f44ff01f8b00a674c071c3776d186bc6c4f1a. 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/7I1vlE14zJWh6u61bBHwZa.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/7I1vlE14zJWh6u61bBHwZa.