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 0x10b5857119b32df1099f157b7654ccde60209f3f3b3374241259c7191cda4e83. 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/d42ad7c0-70ba-4632-8531-53358ed7eb53.json and https://artists.proofprofile.net/proofs/artist/d42ad7c0-70ba-4632-8531-53358ed7eb53.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 0x921b2148fff8c1f3f93bc40537b4cf8a7c8798b0ed7021e5463cb72d518dd8b0. 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/454ySPpa0VIG6mMe5LjEVT.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/454ySPpa0VIG6mMe5LjEVT.
{"copyright_id":"0xc6c1d3664a143c52d3b9633ddf1553c6c951fa2eedfe9f4b1641d4137f84f572","isrc":"ARF412200113","name":"Speed of Sound - Bossa Nova Version","registered_at":"2026-06-04T08:03:18Z","spotify_id":"3LSAYp2ZHHmvS3juBYP2Zq","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c1d3664a143c52d3b9633ddf1553c6c951fa2eedfe9f4b1641d4137f84f572. 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/3LSAYp2ZHHmvS3juBYP2Zq.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/3LSAYp2ZHHmvS3juBYP2Zq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca10b15c909bda0b51cdda2da3344d0b2dfb66c87ae16fcc58dd48748366df1. 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/2yLvp6JQ1ChvPsM8msx2q2.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/2yLvp6JQ1ChvPsM8msx2q2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d47913b821559f86e51358e3a3a41e3b28a4b47c0472f5e7690b2ac10699b9. 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/5NyCwF4yStVMXXsVxcXnEP.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/5NyCwF4yStVMXXsVxcXnEP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faee01d26c00360a7ef11085841b451fbdbac148e0ea658e0c7047f18b77773. 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/5XDkdsAqx7sOJLSTQ7LLr3.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/5XDkdsAqx7sOJLSTQ7LLr3.
{"copyright_id":"0x6274bf04a66a819b939bf6d37993dfcc47f92243abac4866ae2ceaccf60ff8f4","isrc":"ARF412200057","name":"Slave to the Rhythm","registered_at":"2026-06-06T05:22:36Z","spotify_id":"5tt5FNdsOfotyZpLxGNDhH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6274bf04a66a819b939bf6d37993dfcc47f92243abac4866ae2ceaccf60ff8f4. 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/5tt5FNdsOfotyZpLxGNDhH.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/5tt5FNdsOfotyZpLxGNDhH.
{"copyright_id":"0xd59cc907d163f6729e8a7d9aebbfad0055de5530b1cef92edf47143ae88a593d","isrc":"ARF411300977","name":"Wish You Were Here","registered_at":"2026-06-05T17:34:58Z","spotify_id":"7vR7M8a6N5vzUp7rebzOMk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59cc907d163f6729e8a7d9aebbfad0055de5530b1cef92edf47143ae88a593d. 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/7vR7M8a6N5vzUp7rebzOMk.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/7vR7M8a6N5vzUp7rebzOMk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b2148fff8c1f3f93bc40537b4cf8a7c8798b0ed7021e5463cb72d518dd8b0. 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/47f44rOcUA0F40zt3DDInR.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/47f44rOcUA0F40zt3DDInR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c378637045c22d3698de5b7db7e13a9b2f7fc74e0445bc8f7660a90ecae0b59. 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/2N8LXjBdlXs6SBhM1QPIyI.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/2N8LXjBdlXs6SBhM1QPIyI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cccd2e1379384644fd6188a026db576b37c21cfba42c47e7ee9d0108d60d752. 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/1dlvCR47icv2BCiBCSF204.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/1dlvCR47icv2BCiBCSF204.
Vintage Café: Lounge & Jazz Blends (Special Selection), Pt. 2
{"copyright_id":"0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58","isrc":"ARF411001036","name":"My Cherie Amour","registered_at":"2026-06-05T05:13:04Z","spotify_id":"7ajACJJybWj1A2KPCg8h0z","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58. 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/7ajACJJybWj1A2KPCg8h0z.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/7ajACJJybWj1A2KPCg8h0z.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3043c0adb1349de66a501a06c093aa4c11eef51dc3aaa07698f6ff6b37adf5. 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/64B3Qp3SobAb0mgIP4Vlzs.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/64B3Qp3SobAb0mgIP4Vlzs.
Speed of Sound - Groove Da Praia Bossa Mix
{"copyright_id":"0x3151044532a0447195cea433dcfcb0f5a4c6b0414cabcb43a95f1145dc8646cf","isrc":"ARF412200173","name":"Speed of Sound - Groove Da Praia Bossa Mix","registered_at":"2026-06-09T19:02:55Z","spotify_id":"3woJlQqBtE591tvl63dZjQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3151044532a0447195cea433dcfcb0f5a4c6b0414cabcb43a95f1145dc8646cf. 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/3woJlQqBtE591tvl63dZjQ.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/3woJlQqBtE591tvl63dZjQ.
{"copyright_id":"0x9cccd2e1379384644fd6188a026db576b37c21cfba42c47e7ee9d0108d60d752","isrc":"ARF411201193","name":"It Ain't over Til' It's Over","registered_at":"2026-06-04T07:55:54Z","spotify_id":"4tbsXRJitigkUj3njV23pT","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cccd2e1379384644fd6188a026db576b37c21cfba42c47e7ee9d0108d60d752. 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/4tbsXRJitigkUj3njV23pT.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/4tbsXRJitigkUj3njV23pT.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca10b15c909bda0b51cdda2da3344d0b2dfb66c87ae16fcc58dd48748366df1. 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/1Q7m1EZ7s05vCle6JIYv7A.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/1Q7m1EZ7s05vCle6JIYv7A.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921b2148fff8c1f3f93bc40537b4cf8a7c8798b0ed7021e5463cb72d518dd8b0. 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/4BE7bWYPFcc4TS9e9A6bF8.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/4BE7bWYPFcc4TS9e9A6bF8.
{"copyright_id":"0x3151044532a0447195cea433dcfcb0f5a4c6b0414cabcb43a95f1145dc8646cf","isrc":"ARF412200173","name":"Speed of Sound - Groove Da Praia Bossa Mix","registered_at":"2026-06-09T19:02:55Z","spotify_id":"5qqmpWxcDD5zWGzsaqZmEi","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3151044532a0447195cea433dcfcb0f5a4c6b0414cabcb43a95f1145dc8646cf. 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/5qqmpWxcDD5zWGzsaqZmEi.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/5qqmpWxcDD5zWGzsaqZmEi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269efccbe438bc76fddab9af511a6331751945350a9afa068696b01ac5327f08. 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/2cp97808gFFIBlHHlpECw3.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/2cp97808gFFIBlHHlpECw3.
{"copyright_id":"0x9cccd2e1379384644fd6188a026db576b37c21cfba42c47e7ee9d0108d60d752","isrc":"ARF411201193","name":"It Ain't Over Til' It's Over","registered_at":"2026-06-04T07:55:54Z","spotify_id":"2urqkBukw0VyLvM2VAMZVb","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cccd2e1379384644fd6188a026db576b37c21cfba42c47e7ee9d0108d60d752. 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/2urqkBukw0VyLvM2VAMZVb.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/2urqkBukw0VyLvM2VAMZVb.
{"copyright_id":"0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58","isrc":"ARF411001036","name":"My Cherie Amour","registered_at":"2026-06-05T05:13:04Z","spotify_id":"3uoFXYF7WdTUAPr9XzDLCh","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58. 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/3uoFXYF7WdTUAPr9XzDLCh.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/3uoFXYF7WdTUAPr9XzDLCh.
{"copyright_id":"0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58","isrc":"ARF411001036","name":"My Cherie Amour","registered_at":"2026-06-05T05:13:04Z","spotify_id":"76jIXGcV1ZcFKJagrbali0","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/76jIXGcV1ZcFKJagrbali0.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/76jIXGcV1ZcFKJagrbali0.
{"copyright_id":"0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58","isrc":"ARF411001036","name":"My Cherie Amour","registered_at":"2026-06-05T05:13:04Z","spotify_id":"69HTmuetl2KxQlFovMBQKi","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe33bba9d3bc964c7b1046885372abda0f926957cb246fbce7b497e90a7e7d58. 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/69HTmuetl2KxQlFovMBQKi.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/69HTmuetl2KxQlFovMBQKi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56317892c0734a537aa1a25e5272172ca09c0625563fb99e79b723a1f18adfbc. 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/7ndFqHOi1ME2IGMyYrlKKa.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/7ndFqHOi1ME2IGMyYrlKKa.
Brazil - The Complete Bossa Nova Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3043c0adb1349de66a501a06c093aa4c11eef51dc3aaa07698f6ff6b37adf5. 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/5Ks0EEYOr2rQ6DITeL3Kxw.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/5Ks0EEYOr2rQ6DITeL3Kxw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3043c0adb1349de66a501a06c093aa4c11eef51dc3aaa07698f6ff6b37adf5. 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/7dXGgZsbYRAtbVNbXmpj2O.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/7dXGgZsbYRAtbVNbXmpj2O.
{"copyright_id":"0x9cccd2e1379384644fd6188a026db576b37c21cfba42c47e7ee9d0108d60d752","isrc":"ARF411201193","name":"It Ain't Over 'Til It's Over","registered_at":"2026-06-04T07:55:54Z","spotify_id":"4oqdhi7CVCNui8NlGTdfmP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cccd2e1379384644fd6188a026db576b37c21cfba42c47e7ee9d0108d60d752. 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/4oqdhi7CVCNui8NlGTdfmP.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/4oqdhi7CVCNui8NlGTdfmP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3043c0adb1349de66a501a06c093aa4c11eef51dc3aaa07698f6ff6b37adf5. 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/35BwX17pOd2MP2SwLe6QQO.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/35BwX17pOd2MP2SwLe6QQO.