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 0x47b419f9dc4096da34a3aeadaee00e7565d407077f2f15a30b5639afce881275. 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/0515fc6c-4555-4dc9-a8d8-513023354461.json and https://artists.proofprofile.net/proofs/artist/0515fc6c-4555-4dc9-a8d8-513023354461.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 0xa2e3b5ab06455048f2ca11722cd9dd4024fed3988ecc433652b1be32999e10da. 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/6T1FGOC96wa0vaZ6qIz8VK.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/6T1FGOC96wa0vaZ6qIz8VK.
{"copyright_id":"0xfcf035f552b6be113690c6fcdd6ed491bdf2c5efbb5b62e1a1ba3fed075f5156","isrc":"USSM19600055","name":"Killing Me Softly With His Song","registered_at":"2026-06-06T02:40:33Z","spotify_id":"7KghHnawa4wgfXmi2pssf4","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf035f552b6be113690c6fcdd6ed491bdf2c5efbb5b62e1a1ba3fed075f5156. 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/7KghHnawa4wgfXmi2pssf4.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/7KghHnawa4wgfXmi2pssf4.
Hip Hop 100 Hits - Urban rap & R n B anthems inc. Jay Z, A$ap Rocky, Wu-Tang Clan & Nas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac363b3be916a6e15a09e348accd13724811230b0e0fa0e026a515da5e72f52. 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/3qx10Bm7Io0ZA8n4YChNrJ.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/3qx10Bm7Io0ZA8n4YChNrJ.
{"copyright_id":"0xfcf035f552b6be113690c6fcdd6ed491bdf2c5efbb5b62e1a1ba3fed075f5156","isrc":"USSM19600055","name":"Killing Me Softly With His Song","registered_at":"2026-06-06T02:40:33Z","spotify_id":"21hLTKWEWLIei9HH2bWf5Z","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf035f552b6be113690c6fcdd6ed491bdf2c5efbb5b62e1a1ba3fed075f5156. 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/21hLTKWEWLIei9HH2bWf5Z.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/21hLTKWEWLIei9HH2bWf5Z.
Boom Biddy Bye Bye (feat. Fugees) - Fugees Remix
{"copyright_id":"0x52cfda8b3167e715026dbaa7edaa63a1036c45b5372c25ce3fd697fcc58c9bd4","isrc":"USSM19503079","name":"Boom Biddy Bye Bye (feat. Fugees) - Fugees Remix","registered_at":"2026-06-07T10:42:51Z","spotify_id":"66eurOpOrCTQvvm7JVvy98","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cfda8b3167e715026dbaa7edaa63a1036c45b5372c25ce3fd697fcc58c9bd4. 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/66eurOpOrCTQvvm7JVvy98.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/66eurOpOrCTQvvm7JVvy98.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a86352e1340eb5a6aa505a0d462014655c9dab8d26b470004182b46ed5d5b. 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/6nc6alU2UxQb4XfkublZES.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/6nc6alU2UxQb4XfkublZES.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a86352e1340eb5a6aa505a0d462014655c9dab8d26b470004182b46ed5d5b. 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/0dL0N32pD5BURCjsZlYZrx.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/0dL0N32pD5BURCjsZlYZrx.
{"copyright_id":"0xfcf035f552b6be113690c6fcdd6ed491bdf2c5efbb5b62e1a1ba3fed075f5156","isrc":"USSM19600055","name":"Killing Me Softly With His Song","registered_at":"2026-06-06T02:40:33Z","spotify_id":"6E7cDNrHX5Sjt9r7svRDiO","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf035f552b6be113690c6fcdd6ed491bdf2c5efbb5b62e1a1ba3fed075f5156. 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/6E7cDNrHX5Sjt9r7svRDiO.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/6E7cDNrHX5Sjt9r7svRDiO.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a86352e1340eb5a6aa505a0d462014655c9dab8d26b470004182b46ed5d5b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7EpfuCGbV0DGXRhD6eqUQi.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/7EpfuCGbV0DGXRhD6eqUQi.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee6882e09e79b78170ae0d9bc8a35487b30537ae9622a77eca439e139a8cd70. 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/7ywBmZOgWhPMj1wljWn6vL.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/7ywBmZOgWhPMj1wljWn6vL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a86352e1340eb5a6aa505a0d462014655c9dab8d26b470004182b46ed5d5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/0oH95tc6TFNZ0bvNce7vFJ.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/0oH95tc6TFNZ0bvNce7vFJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a86352e1340eb5a6aa505a0d462014655c9dab8d26b470004182b46ed5d5b. 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/4RKxpwfaqBSZHOS1otaiGm.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/4RKxpwfaqBSZHOS1otaiGm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a86352e1340eb5a6aa505a0d462014655c9dab8d26b470004182b46ed5d5b. 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/5udQm6WQ8D6AWJeOQfoy3Z.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/5udQm6WQ8D6AWJeOQfoy3Z.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac363b3be916a6e15a09e348accd13724811230b0e0fa0e026a515da5e72f52. 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/6FD3liZ3fwzz9b7r1QsCkw.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/6FD3liZ3fwzz9b7r1QsCkw.
{"copyright_id":"0x745358f5f5baabc076b3b14c3db4e1f0405e22e7b07eb39660ab2f260935c8bc","isrc":"USSM11406867","name":"Boom Biddy Bye Bye - Fugees Remix","registered_at":"2026-06-04T15:28:56Z","spotify_id":"6CRf8EO6lDCHW4SscdXZkv","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745358f5f5baabc076b3b14c3db4e1f0405e22e7b07eb39660ab2f260935c8bc. 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/6CRf8EO6lDCHW4SscdXZkv.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/6CRf8EO6lDCHW4SscdXZkv.