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 0x41b3e6714a3d187049673ed09157e82fb3d4b48354eccc8b9d2fb7ea9b230a79. 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/b7ce44f7-96f8-4dc0-8abb-edf28b73c419.json and https://artists.proofprofile.net/proofs/artist/b7ce44f7-96f8-4dc0-8abb-edf28b73c419.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 0x157c00935504785de1597824d8df6e0984eba388070b8c14b6519c1abb445259. 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/2bbhyUWJ5VjdfI3P4PRLu2.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/2bbhyUWJ5VjdfI3P4PRLu2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f3c5cfb540218091717b4f9c969042736890af3bf69f9a1da1fb5b56676d6e. 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/2bv5aQIuutB88mNztwmtQs.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/2bv5aQIuutB88mNztwmtQs.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571914b0efaa8df05448feb382a02f4e43811b6acf51af165744b3ab2a560556. 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/0N9WhEz6DiBDvBxa6uJCTY.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/0N9WhEz6DiBDvBxa6uJCTY.
{"copyright_id":"0xf6303fe2a492fd3c42da54c10b0c151a5f456a4463c463e025efcebe035a49c9","isrc":"USWB10901319","name":"Laughing With","registered_at":"2026-06-04T13:48:09Z","spotify_id":"26COgYlbcouIcJo3nprpox","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6303fe2a492fd3c42da54c10b0c151a5f456a4463c463e025efcebe035a49c9. 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/26COgYlbcouIcJo3nprpox.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/26COgYlbcouIcJo3nprpox.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5318418bd7c507d38c3a16cafafa16204420508adf663eecbaaf81f82f28dffd. 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/341863z079BT4EFPiSw9DP.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/341863z079BT4EFPiSw9DP.
{"copyright_id":"0x7d24cb3db08d17a243d49f196e2360042dfe8bddd8aa3795775c94b3dfdd287c","isrc":"GBCFB1700216","name":"Just A Memory","registered_at":"2026-06-04T15:43:28Z","spotify_id":"0KtzMx1GbkkPyA2TQceHoM","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24cb3db08d17a243d49f196e2360042dfe8bddd8aa3795775c94b3dfdd287c. 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/0KtzMx1GbkkPyA2TQceHoM.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/0KtzMx1GbkkPyA2TQceHoM.
{"copyright_id":"0x7d24cb3db08d17a243d49f196e2360042dfe8bddd8aa3795775c94b3dfdd287c","isrc":"GBCFB1700216","name":"Just A Memory","registered_at":"2026-06-04T15:43:28Z","spotify_id":"0mfSivZmglC3Hfn0NzssOY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24cb3db08d17a243d49f196e2360042dfe8bddd8aa3795775c94b3dfdd287c. 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/0mfSivZmglC3Hfn0NzssOY.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/0mfSivZmglC3Hfn0NzssOY.
{"copyright_id":"0xd57792cc79129d70dd1a4d1bc7b2dc04669dcdef3db417683ce69af7eee60cc7","isrc":"USWB10901899","name":"Two Birds","registered_at":"2026-06-07T12:51:40Z","spotify_id":"5cCEZOnHB7iyU1xeyOqCaF","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57792cc79129d70dd1a4d1bc7b2dc04669dcdef3db417683ce69af7eee60cc7. 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/5cCEZOnHB7iyU1xeyOqCaF.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/5cCEZOnHB7iyU1xeyOqCaF.
{"copyright_id":"0x403a9fa6b1e81ae50ccd502cc9302623b818c4137f9bc12721e3c453be87bb4e","isrc":"USAT21603220","name":"Dear Theodosia (feat. Ben Folds)","registered_at":"2026-06-04T11:01:46Z","spotify_id":"1fq4k7G5kYqUvKIuEmFAAo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403a9fa6b1e81ae50ccd502cc9302623b818c4137f9bc12721e3c453be87bb4e. 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/1fq4k7G5kYqUvKIuEmFAAo.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/1fq4k7G5kYqUvKIuEmFAAo.
{"copyright_id":"0xebaf88aff08ea33405cfed6d4c33586d89c9a3fa7014a819091d7f13c4cebd8e","isrc":"US23A1551340","name":"Balloon Girl - 2022 Mix","registered_at":"2026-06-25T07:58:09Z","spotify_id":"0kvqLNVA9VBJ8xxz0RvOjw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaf88aff08ea33405cfed6d4c33586d89c9a3fa7014a819091d7f13c4cebd8e. 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/0kvqLNVA9VBJ8xxz0RvOjw.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/0kvqLNVA9VBJ8xxz0RvOjw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5924e2b4f01a46c8e24623f85055331d10830850019578309aec3c7eed5b9a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0byNaY1lJ9zfAKiLh9ASah.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/0byNaY1lJ9zfAKiLh9ASah.
{"copyright_id":"0xebaf88aff08ea33405cfed6d4c33586d89c9a3fa7014a819091d7f13c4cebd8e","isrc":"US23A1551340","name":"Balloon Girl - 2022 Mix","registered_at":"2026-06-25T07:58:09Z","spotify_id":"3t3WxisTyxxwXjvBqvYUXn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaf88aff08ea33405cfed6d4c33586d89c9a3fa7014a819091d7f13c4cebd8e. 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/3t3WxisTyxxwXjvBqvYUXn.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/3t3WxisTyxxwXjvBqvYUXn.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5924e2b4f01a46c8e24623f85055331d10830850019578309aec3c7eed5b9a. 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/1VtgrojfaXBB7bSRqdp2a5.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/1VtgrojfaXBB7bSRqdp2a5.
Instant Karma: The Amnesty International Campaign To Save Darfur (Standard Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77362e0e37ace33b3043cf568f3302b7fa36661a7b62b02e281942f1236197f. 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/4sQfUBzqyKYALy103CsJ8d.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/4sQfUBzqyKYALy103CsJ8d.
Instant Karma: The Amnesty International Campaign To Save Darfur [The Complete Recordings] (Audio Only)
Make Some Noise: The Amnesty International Campaign To Save Darfur (Int'l Only)
Instant Karma: The Amnesty International Campaign To Save Darfur (U.K. Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77362e0e37ace33b3043cf568f3302b7fa36661a7b62b02e281942f1236197f. 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/2P2VakHde1D2h6FqbPm8sn.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/2P2VakHde1D2h6FqbPm8sn.