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 0x221b83b293037dec432f93568fb74b10a15f4a0f1e81d699e2e68eba5aeb45f3. 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/e3bb2f8d-f789-4ece-8382-6055464f6f98.json and https://artists.proofprofile.net/proofs/artist/e3bb2f8d-f789-4ece-8382-6055464f6f98.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
KAIJI -Ultimate Survivor- Original Soundtrack
{"copyright_id":"0xcd49c192fc8efcea2274b78adde1a6bca1d5841b6499cbac78484c49859fe05d","isrc":"JPVP00710812","name":"Kaiji theme","registered_at":"2026-06-29T08:42:22Z","spotify_id":"4HyaMMjlv4t7L4OUhxOtY3","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 0xcd49c192fc8efcea2274b78adde1a6bca1d5841b6499cbac78484c49859fe05d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4HyaMMjlv4t7L4OUhxOtY3.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/4HyaMMjlv4t7L4OUhxOtY3.
{"copyright_id":"0xfefbf973f6a0655c8533ea4af03175551a4e40b9daacfb2547bbcadd0f57a122","isrc":"JPVP00710823","name":"Makeinu Tachi no Requiem","registered_at":"2026-06-29T08:39:39Z","spotify_id":"7oFCnXb7afN8tCokqaaZsE","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefbf973f6a0655c8533ea4af03175551a4e40b9daacfb2547bbcadd0f57a122. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7oFCnXb7afN8tCokqaaZsE.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/7oFCnXb7afN8tCokqaaZsE.
逆境無頼カイジ オリジナル・サウンドトラック
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefbf973f6a0655c8533ea4af03175551a4e40b9daacfb2547bbcadd0f57a122. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1Lgm8X05N0kM5nXhY1a500.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/1Lgm8X05N0kM5nXhY1a500.
KAIJI -Against All Rules- Original Soundtrack
逆境無頼カイジ 破戒録篇 オリジナル・サウンドトラック
L's Theme (From "Death Note") [Piano Version]
L's Theme (From "Death Note") - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ac0bd5c14271267d0805b61662c3f6f6dbce302a14edb2af6971381c780eab. 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/6ZLQDL4mgQoI4QNlTFiki4.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/6ZLQDL4mgQoI4QNlTFiki4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf904f478e7d88eb122d5b78dc1a7aaf40ce54f70e8f279e450483227375f1f09. 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/6NxREG1LnCcwwt0MiQ7O3I.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/6NxREG1LnCcwwt0MiQ7O3I.
{"copyright_id":"0xc651e11b33c998bc2da7fc2ff1efb3f4fa54079d58c63d9d82abd179e839f2e2","isrc":"JPVP00614203","name":"Light no Theme","registered_at":"2026-06-04T07:28:31Z","spotify_id":"27DZsCvzex3F1GrB9j6d9U","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc651e11b33c998bc2da7fc2ff1efb3f4fa54079d58c63d9d82abd179e839f2e2. 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/27DZsCvzex3F1GrB9j6d9U.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/27DZsCvzex3F1GrB9j6d9U.
{"copyright_id":"0xf8dbb1a2eb35dfcbea21356f803893a9ce2f4413fe853dc502fa22cf02f05ad6","isrc":"JPVP00614204","name":"L no Theme","registered_at":"2026-06-04T06:46:19Z","spotify_id":"4tNMhJlHB0vJMadXGCdteB","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dbb1a2eb35dfcbea21356f803893a9ce2f4413fe853dc502fa22cf02f05ad6. 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/4tNMhJlHB0vJMadXGCdteB.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/4tNMhJlHB0vJMadXGCdteB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc045690629053c11f0d832095fd6d12a96cc5fba5bf8116d0584200c24e01a7. 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/1v0oUrGrUXwOm3OhT3pDNl.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/1v0oUrGrUXwOm3OhT3pDNl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824208ada95fa80cb6f504301d13eaf57e5e833b1c17365a98c29487585b5a5e. 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/3V710HiuXy8xYuD5O1hSO9.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/3V710HiuXy8xYuD5O1hSO9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff45824783c3266fe357e4a4d24fac4a26af6b417b2e21ce4a66de2b47bc363. 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/6XjUWGH6RptJXzp9ry0d3t.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/6XjUWGH6RptJXzp9ry0d3t.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1297f46bad393c8eeea9651bf5078f99337d79104bf861b9bc69950c3755d91. 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/5IgCTgnXXOuZSv7VHbdJy0.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/5IgCTgnXXOuZSv7VHbdJy0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc6ca12cdd237cae44920333a1429d00733aeec0970853d4c6841948f02dd03. 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/11tndq3H5U2iwMHWoOA16N.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/11tndq3H5U2iwMHWoOA16N.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8671ff3d6b380c9178f81e87a4116a7101b86c775a59928668ccdd4f19c64e15. 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/3KudsYgN7pUXsgSEH0pkIR.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/3KudsYgN7pUXsgSEH0pkIR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0d65f29c1b3a9147849c05b5db57a9c18389dacbfa45f41b00d67441f1e671. 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/51HAxeq4x0PL85jaIyPZgD.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/51HAxeq4x0PL85jaIyPZgD.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26ededa24f832c2f28977f2f336378747e48ae212e9a8aa45a1e387bb123360. 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/4serFrU8at941xKPEfvCrZ.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/4serFrU8at941xKPEfvCrZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e15059ff70d5b1cc18d8c31313571ce6acba6f30315a6316cbed5cb4a2c03f. 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/4l05mJnkB6buoVDVe0dazP.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/4l05mJnkB6buoVDVe0dazP.
{"copyright_id":"0x0ff18ea090ff30f6e8b696118519e56daef8f818ef04a971fa3ca5dcdfada3b4","isrc":"JPVP00614214","name":"L no Nakama","registered_at":"2026-06-04T14:25:27Z","spotify_id":"6YODRU5h0HV1u6wGQnEel8","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff18ea090ff30f6e8b696118519e56daef8f818ef04a971fa3ca5dcdfada3b4. 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/6YODRU5h0HV1u6wGQnEel8.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/6YODRU5h0HV1u6wGQnEel8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d5e27947a2c86d12f2278736c24a4166edccaba485ee747edede56be0aa0ce. 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/5nU0eRIql9LOTXijksH0ul.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/5nU0eRIql9LOTXijksH0ul.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3341c3c8204a9dde54ad1a11e68b25302eac76be67a5599e32347f40f1568ff9. 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/3dHkRE9VZf5Kq4jQBpfzuI.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/3dHkRE9VZf5Kq4jQBpfzuI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98e73647bd1fad500b0b0060d8694fbef732758f70e4667369091dd23409870. 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/7pPt2cOtNF0Fz1VnszlmVR.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/7pPt2cOtNF0Fz1VnszlmVR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d99c8ad96617d7a96887e00a250130538b2c98bdafbc58837387957c39b278. 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/3FXq4TR2Q9kAY0M8v993NW.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/3FXq4TR2Q9kAY0M8v993NW.