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 0x754b5192909aa5664d3ce2c0fb5cc7cba05bdc6a5797a9440a910653f826b05a. 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/95dfdc1e-c2a4-474a-9cee-b3902a4fd029.json and https://artists.proofprofile.net/proofs/artist/95dfdc1e-c2a4-474a-9cee-b3902a4fd029.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 0x4f1ceac9f0937a3cca86545fcfeb859cdc0623e8664fef96225a26774818e8fe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/61mCPqfSsa0wita9su7x7Y.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/61mCPqfSsa0wita9su7x7Y.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056952b282e7e30898377242966f18be476650b8981e15ddd4b90136fb116427. 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/5tHNJYElWaDQ4GnM8Q15sc.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/5tHNJYElWaDQ4GnM8Q15sc.
{"copyright_id":"0x4f1ceac9f0937a3cca86545fcfeb859cdc0623e8664fef96225a26774818e8fe","isrc":"QZRP52187820","name":"Dead Opps","registered_at":"2026-06-08T22:48:50Z","spotify_id":"1x6Swp3XwkGSOQbVyMXzIF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ceac9f0937a3cca86545fcfeb859cdc0623e8664fef96225a26774818e8fe. 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/1x6Swp3XwkGSOQbVyMXzIF.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/1x6Swp3XwkGSOQbVyMXzIF.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef77882b654d49904ae65f686b527fa7299ae4093747d109f0e63a7f31ce5e47. 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/64amTV7feO7jEp2QRYSQ2l.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/64amTV7feO7jEp2QRYSQ2l.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168015eec6b0b1e174a0335b8b7442827250659fa6029772737c465ca55aee5e. 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/5WtfgHppfB4t1vx5ySweSp.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/5WtfgHppfB4t1vx5ySweSp.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866bbef9be5cbe617c36d60ce8f547884968704b8343cb2cf182440e483ff51b. 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/2km8Q4fmev7RnfTaBPIjIi.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/2km8Q4fmev7RnfTaBPIjIi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa33cf8faac4243b7da13ea4d048ae8b1d4a0079852e2be70b8c21c9171221b. 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/5pO9eI2M5GZxugSnOP2K7V.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/5pO9eI2M5GZxugSnOP2K7V.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fb95dff79275ebca0af246b6e11ca7d7dd267e3e28cef2635a1913c2ef0ec9. 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/5EnR9lYqO1pGiqWrMNaVji.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/5EnR9lYqO1pGiqWrMNaVji.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca4e1c178d5f8c93a795509d7fc6658c8a47f92e77512192b10edf472acc5b3. 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/354ndEF6IgSPbGBChcJRgJ.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/354ndEF6IgSPbGBChcJRgJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207a3ddea08d8d5ff325fb5fad613cf60c4b53595f51550c91641699bb3ab2c7. 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/7uNH4KLHW4jpeHuDkbJ0gL.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/7uNH4KLHW4jpeHuDkbJ0gL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742b1ad6c64d2e5956811c01f0cda34c6efea0eeca7e7487654bb75035214ec5. 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/6RtOtUKPfMwr92cXLpouSy.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/6RtOtUKPfMwr92cXLpouSy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96b66e3bb3cf296a614f62215b8a1d3dc0d5ff977bcb06ea60d28ab8a4e5547. 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/212RSVxSoWb8RKc7R2sVVt.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/212RSVxSoWb8RKc7R2sVVt.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8fd87d9a0bd4593439c65f71d882c2726365f96e6e1acdb8782684caa32ce0. 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/3D0i467w9SVMIPyuHuthsu.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/3D0i467w9SVMIPyuHuthsu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68fd5aa8001061a81c196e4028dbda1edb290fc332b15063e2e38a74642eb8c. 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/4dbjUShRrlsbzY3gSslv8v.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/4dbjUShRrlsbzY3gSslv8v.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda6916ad447e85214b623cd5e4d412e2a8c03884f904a073fec7c5ba16c2614. 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/2IhCy1KiS7jKs6K6rowcIP.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/2IhCy1KiS7jKs6K6rowcIP.
{"copyright_id":"0x5eb0a07c3b1103a8b1c80c5956a264ddcdd3db44184dedefee1cf2219a86d275","isrc":"TCAFJ2142451","name":"Ren Niet Op Mij","registered_at":"2026-06-05T22:05:29Z","spotify_id":"6lnVzp4x7hqdyKfKazSZnE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb0a07c3b1103a8b1c80c5956a264ddcdd3db44184dedefee1cf2219a86d275. 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/6lnVzp4x7hqdyKfKazSZnE.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/6lnVzp4x7hqdyKfKazSZnE.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc524267b0419d4c55cea80754b850441391054da7131d8b48045237ca351b19c. 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/2DiIVwv5Vf1aD7uiGuGppV.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/2DiIVwv5Vf1aD7uiGuGppV.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30515ec32c470cadb7b6bcc4ef3cc0eb72f5837ef05c80a167578e312af2c44b. 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/5EeROeQZqZPm3mK3BOD8o6.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/5EeROeQZqZPm3mK3BOD8o6.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6f78f0fa9112c0efbb66967d1e549d2194032d8cc259055b0879867af4ee5. 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/3cTiEPdBd2SsnIjkwZze4E.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/3cTiEPdBd2SsnIjkwZze4E.