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 0x4030c21918fb909db7963c966fb644156f76ca6558bc3bd2c12e57c141628d59. 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/36ccc377-d0b1-4cde-9601-02481aa0b424.json and https://artists.proofprofile.net/proofs/artist/36ccc377-d0b1-4cde-9601-02481aa0b424.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x780ed93bbef8935fa86f2b8e0af27988c56997e409837b70c3780a4694063d96","isrc":"GBCRL1200286","name":"Ac-Cent-Tchu-Ate the Positive","registered_at":"2026-06-07T14:46:36Z","spotify_id":"2W2wbW6pdWATNGMQIJWORI","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 0x780ed93bbef8935fa86f2b8e0af27988c56997e409837b70c3780a4694063d96. 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/2W2wbW6pdWATNGMQIJWORI.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/2W2wbW6pdWATNGMQIJWORI.
{"copyright_id":"0x3886efd1ee774d2c44266e72a9975858bca9977f4d095adc6ffcffc4e71612e9","isrc":"GBCRL1200290","name":"Bei Mir Bist Du Schön","registered_at":"2026-06-10T05:46:58Z","spotify_id":"4EWScvi7jE1rsbNsJgbsD2","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3886efd1ee774d2c44266e72a9975858bca9977f4d095adc6ffcffc4e71612e9. 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/4EWScvi7jE1rsbNsJgbsD2.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/4EWScvi7jE1rsbNsJgbsD2.
{"copyright_id":"0xad653ba507b043337cadbe6796514b93d905f3a5b0e50912ea6c7bbad6ad5f20","isrc":"GBCRL1200287","name":"A Place in the Sun","registered_at":"2026-06-08T04:50:28Z","spotify_id":"7BizuIGc4YG8DXAf2VKnWt","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad653ba507b043337cadbe6796514b93d905f3a5b0e50912ea6c7bbad6ad5f20. 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/7BizuIGc4YG8DXAf2VKnWt.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/7BizuIGc4YG8DXAf2VKnWt.
Don't Go To Strangers - from the Hootenanny 2006
Jools Holland, Amy Winehouse and Paul Weller
{"copyright_id":"0x0b083104681f838f86eb2ba3b8a3c33d33c65a8cd699eb58863d011ce4c231fc","isrc":"GBCAD1200705","name":"Don't Go To Strangers - from the Hootenanny 2006","registered_at":"2026-06-05T17:36:39Z","spotify_id":"0pJk0HKFWkL9unkTOcTfrT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b083104681f838f86eb2ba3b8a3c33d33c65a8cd699eb58863d011ce4c231fc. 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/0pJk0HKFWkL9unkTOcTfrT.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/0pJk0HKFWkL9unkTOcTfrT.
{"copyright_id":"0x8d813d97bf1231f0ffd229caa3fc366eb52b0d12155284b3e7f0362b3bbd4cd7","isrc":"GBCRL1200284","name":"Mad About the Boy","registered_at":"2026-06-07T21:19:10Z","spotify_id":"5crufJHDql7EiCojAXli8K","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d813d97bf1231f0ffd229caa3fc366eb52b0d12155284b3e7f0362b3bbd4cd7. 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/5crufJHDql7EiCojAXli8K.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/5crufJHDql7EiCojAXli8K.
{"copyright_id":"0xbe4bc18e3793c3b7ce452d79455cd453ab531db36a4481c0bf1635d9c78ed97a","isrc":"GBCRL1200277","name":"I'll Sail My Ship Alone","registered_at":"2026-06-09T09:29:27Z","spotify_id":"4o3XUotIyKlAcGPxHwgbXZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4bc18e3793c3b7ce452d79455cd453ab531db36a4481c0bf1635d9c78ed97a. 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/4o3XUotIyKlAcGPxHwgbXZ.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/4o3XUotIyKlAcGPxHwgbXZ.
From Tyne to Tweed' - The Northumbria Anthology
Teach Me Tonight - Live On Jools Holland Hootenanny / 2004
{"copyright_id":"0x53516a9b57ee5636f0fa63c0fe751dac523ed653e4d6451ad76d10af4c0e8dd7","isrc":"GBCAD2001787","name":"Teach Me Tonight - Live On Jools Holland Hootenanny / 2004","registered_at":"2026-06-04T08:27:42Z","spotify_id":"1U0cCrP1EhDFlmB6CTRh5O","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53516a9b57ee5636f0fa63c0fe751dac523ed653e4d6451ad76d10af4c0e8dd7. 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/1U0cCrP1EhDFlmB6CTRh5O.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/1U0cCrP1EhDFlmB6CTRh5O.
Tenderly - Live On Later... With Jools Holland / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6151c36014d196078290f9101333a34986088905eae3ead9a948f85a10d28b. 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/2RtYWELB3znKy86yd9VTfI.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/2RtYWELB3znKy86yd9VTfI.
Monkey Man - Live On Jools Holland Hootenanny / 2006
{"copyright_id":"0x31a8a6123ef3285b9050756d15f9a9d8d7ea5de3aef488ddf8194fe712456fea","isrc":"GBCAD2001791","name":"Monkey Man - Live On Jools Holland Hootenanny / 2006","registered_at":"2026-06-04T11:01:36Z","spotify_id":"11RwX2XrkrduAwdmug89ja","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8a6123ef3285b9050756d15f9a9d8d7ea5de3aef488ddf8194fe712456fea. 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/11RwX2XrkrduAwdmug89ja.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/11RwX2XrkrduAwdmug89ja.
I Heard It Through The Grapevine - Live On Jools Holland Hootenanny / 31st December 2006
{"copyright_id":"0x20afb45bd33ee21a70cbf9c3086ffff81f8edf1699de2fb92852444bf53affbe","isrc":"GBCAD2001792","name":"I Heard It Through The Grapevine - Live On Jools Holland Hootenanny / 31st December 2006","registered_at":"2026-06-04T07:13:20Z","spotify_id":"5kB7BZY3dJJtQYiXkyesrD","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20afb45bd33ee21a70cbf9c3086ffff81f8edf1699de2fb92852444bf53affbe. 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/5kB7BZY3dJJtQYiXkyesrD.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/5kB7BZY3dJJtQYiXkyesrD.
Don't Go To Strangers - Live On Jools Holland Hootenanny / 2006
{"copyright_id":"0xe5fadc57a18a4bc777bf98491c069da3631bd24e975f2ea36788b0bafe423988","isrc":"GBCAD2001793","name":"Don't Go To Strangers - Live On Jools Holland Hootenanny / 2006","registered_at":"2026-06-04T09:08:53Z","spotify_id":"3kt92YozPwnpnE5yQziJ60","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fadc57a18a4bc777bf98491c069da3631bd24e975f2ea36788b0bafe423988. 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/3kt92YozPwnpnE5yQziJ60.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/3kt92YozPwnpnE5yQziJ60.
{"copyright_id":"0xa22dfff5347c4215fe05ee3311b7bc291e260907fca172e29e2589d93323db7c","isrc":"GBCRL2300221","name":"Lullaby of Broadway","registered_at":"2026-06-07T09:36:25Z","spotify_id":"6D2NGWYJDpIg3BaskUW4wo","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22dfff5347c4215fe05ee3311b7bc291e260907fca172e29e2589d93323db7c. 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/6D2NGWYJDpIg3BaskUW4wo.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/6D2NGWYJDpIg3BaskUW4wo.
{"copyright_id":"0x860270240c45f55cd1f03118d6e8cb7e9fefc3677cf01f354fd157dbad80f160","isrc":"GBCRL2300222","name":"Oh Marie","registered_at":"2026-06-07T21:40:21Z","spotify_id":"7uFmyiPuF3NFkumTPHbDMZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860270240c45f55cd1f03118d6e8cb7e9fefc3677cf01f354fd157dbad80f160. 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/7uFmyiPuF3NFkumTPHbDMZ.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/7uFmyiPuF3NFkumTPHbDMZ.
{"copyright_id":"0x7f97bb10fb321f0ec636de54b1574a1c75b70880032f285e6cf66c20d406e774","isrc":"GBCRL2300223","name":"Sentimental Journey","registered_at":"2026-06-07T15:38:40Z","spotify_id":"1cWDTMc0XOWysUoiIhjbGs","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f97bb10fb321f0ec636de54b1574a1c75b70880032f285e6cf66c20d406e774. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1cWDTMc0XOWysUoiIhjbGs.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/1cWDTMc0XOWysUoiIhjbGs.
{"copyright_id":"0x54438328b39443f0bb3a5fcf32c4395a8e3843fbede9d4aa0c45d9da1b814a9d","isrc":"GBCRL2300224","name":"Pennies from Heaven","registered_at":"2026-06-07T15:43:28Z","spotify_id":"6VeuzOYMfp5AgJ0UAHcQlJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54438328b39443f0bb3a5fcf32c4395a8e3843fbede9d4aa0c45d9da1b814a9d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6VeuzOYMfp5AgJ0UAHcQlJ.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/6VeuzOYMfp5AgJ0UAHcQlJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d60e98ffeb969588a0074cc51bba718049cb3632162d6196d8c195433a4c433. 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/3AdFkgjCz5wioAPNPRUsO2.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/3AdFkgjCz5wioAPNPRUsO2.