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 0x2d50cf440062a4ea061c7ca67b02b1eaf8c296e7daa1a6ea8ac01b2beb9e0073. 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/a3fb9f59-8726-4ec5-bb45-e758f99e23f2.json and https://artists.proofprofile.net/proofs/artist/a3fb9f59-8726-4ec5-bb45-e758f99e23f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Call of Duty®: Black Ops 6 - Zombies "Citadelle des Morts" (Original Soundtrack)
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 0x24446ba8df6e48daf76e36e2503a62a072fdd196563cde8451eac91030af7713. 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/2F056mfwVgfZN5XMYTgLFx.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/2F056mfwVgfZN5XMYTgLFx.
{"copyright_id":"0x9045a08dccc7931bb82d0fd80e36415c8835eb8b3054c770dc2d908d5473ecf4","isrc":"QZZEB2441476","name":"Citadelle des Morts Intro","registered_at":"2026-06-20T13:14:08Z","spotify_id":"4v5qVmLdGn2AmzKPGhr9fM","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9045a08dccc7931bb82d0fd80e36415c8835eb8b3054c770dc2d908d5473ecf4. 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/4v5qVmLdGn2AmzKPGhr9fM.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/4v5qVmLdGn2AmzKPGhr9fM.
{"copyright_id":"0x4b87448abb4541172fd58cd71b87f44b492e6a1e4a2e95aa1821601450a28ef7","isrc":"QZZEB2441480","name":"Bienvenue à la Citadelle des Morts","registered_at":"2026-06-24T23:19:57Z","spotify_id":"5Tg5OHdG2XyI1yl1U04yYW","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b87448abb4541172fd58cd71b87f44b492e6a1e4a2e95aa1821601450a28ef7. 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/5Tg5OHdG2XyI1yl1U04yYW.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/5Tg5OHdG2XyI1yl1U04yYW.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4988af5d07823d825f8f807297cb22bc02785ad17582813acbc229f12555134. 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/4JOVdNAKHO1JyBq83a2rxc.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/4JOVdNAKHO1JyBq83a2rxc.
{"copyright_id":"0x5e4f99bc8b257b78f339ce69342c1ee7770b63f54bf8aedabb11fdd337b0db2f","isrc":"QZZEB2441485","name":"Club Thumper - Dancing Cat","registered_at":"2026-06-27T18:23:37Z","spotify_id":"5lzhQXdBlyHpBsAyI9UOHd","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f99bc8b257b78f339ce69342c1ee7770b63f54bf8aedabb11fdd337b0db2f. 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/5lzhQXdBlyHpBsAyI9UOHd.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/5lzhQXdBlyHpBsAyI9UOHd.
{"copyright_id":"0x16df2a6717df3a5ca67a7a96ab6c157bbd81925b6d31b0f560b6aaa20cdefbd3","isrc":"QZZEB2441488","name":"Club Thumper - Angry Cat","registered_at":"2026-06-26T17:52:47Z","spotify_id":"47jKM7b6hdC8IY2DDuoqEY","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df2a6717df3a5ca67a7a96ab6c157bbd81925b6d31b0f560b6aaa20cdefbd3. 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/47jKM7b6hdC8IY2DDuoqEY.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/47jKM7b6hdC8IY2DDuoqEY.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8516aff86eb524730102a28f339e73e5d9fdf5d7cda90344ad53583cbbc236b3. 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/55CJK1uVVChrtyCulQJbRm.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/55CJK1uVVChrtyCulQJbRm.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97bb2e5fdc2f234f32cb6ac11b232d6ff80a98c5818ab3c67781321976578e5. 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/3eJAkubuH3eKwrqHft3DxG.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/3eJAkubuH3eKwrqHft3DxG.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d32d5479f0ad4a47098f348fe154f2b20d50ffced01f2f6358e1385b236b6e9. 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/3sH3CjYfBW7TkhGuyWIdm7.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/3sH3CjYfBW7TkhGuyWIdm7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27578a22ea4bebc4bc3078e6255aeea51d93eb4a61d4c93415fbc976c5e0d7e5. 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/0rsTzjvfLGvx2IbdLvKpRj.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/0rsTzjvfLGvx2IbdLvKpRj.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff530ea7207234491e612a5d5b620d69c0429f7d7afaf1753d7a9a1233745bb. 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/1Ch6xMDNoWsODZ1y1OhTCd.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/1Ch6xMDNoWsODZ1y1OhTCd.
{"copyright_id":"0xe2d7441a937fab06516c91e2ced46a8e74d9116c7de2dc11c3cc1abafa5e4d60","isrc":"QZZEB2441521","name":"Citadel Des Morts Rounds","registered_at":"2026-06-27T18:22:30Z","spotify_id":"0YwTOf1PsR81qrlQbzIofZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d7441a937fab06516c91e2ced46a8e74d9116c7de2dc11c3cc1abafa5e4d60. 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/0YwTOf1PsR81qrlQbzIofZ.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/0YwTOf1PsR81qrlQbzIofZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab9916e68d87bdeaf14a7427439d12eb1f3135000f07e4d40e9d373c4373cf7. 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/1efTOJP8dZoI1b0XkheSzq.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/1efTOJP8dZoI1b0XkheSzq.
{"copyright_id":"0x103ed2ebdca0d2ca48e32b7b7792da2f1d66fcfe06225e16615a9920db7ceea5","isrc":"QZZEB2441534","name":"Slave - Mr. Peeks' Mix","registered_at":"2026-06-23T17:28:08Z","spotify_id":"0v1lgCoZdwWQQxbfcXkIU5","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103ed2ebdca0d2ca48e32b7b7792da2f1d66fcfe06225e16615a9920db7ceea5. 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/0v1lgCoZdwWQQxbfcXkIU5.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/0v1lgCoZdwWQQxbfcXkIU5.
{"copyright_id":"0x4e9a7f79f12610a1160ac6cd93bdac5e4b7f0f55eb464436fb07fd853829e52a","isrc":"QZZEB2441538","name":"Slave - Instrumental","registered_at":"2026-06-18T22:27:37Z","spotify_id":"34r2VdkSNUTh6UPmIVmB5Z","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9a7f79f12610a1160ac6cd93bdac5e4b7f0f55eb464436fb07fd853829e52a. 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/34r2VdkSNUTh6UPmIVmB5Z.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/34r2VdkSNUTh6UPmIVmB5Z.
Call of Duty Black Ops II (Original Game Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80510f824726c4307df693a7892cc77ba80adafead760c991a5c59e3c27416c. 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/3CKPglovNzAIo7stlp65T8.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/3CKPglovNzAIo7stlp65T8.
{"copyright_id":"0xbf86c3edadf4c9f3bfa50469faeff067a33874ac262839a0dbe5aef1a0f93291","isrc":"USA2P1272740","name":"Shadows (Outer Club Solar)","registered_at":"2026-06-09T19:09:10Z","spotify_id":"31QH6cJ2gQP6ZSkmarTNPu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf86c3edadf4c9f3bfa50469faeff067a33874ac262839a0dbe5aef1a0f93291. 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/31QH6cJ2gQP6ZSkmarTNPu.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/31QH6cJ2gQP6ZSkmarTNPu.