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 0x984e08265cfdac15d31f053740424c6f870eca061fa5dc67348566f5302293ea. 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/fba29a77-e3df-419b-9cac-cf7155fa9502.json and https://artists.proofprofile.net/proofs/artist/fba29a77-e3df-419b-9cac-cf7155fa9502.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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{"copyright_id":"0x2050eaf04303b1c6e87536cd771b308045e0baefadfa2e5711b811f5fc5bd274","isrc":"JPQ941500011","name":"Children Record","registered_at":"2026-06-06T09:00:05Z","spotify_id":"7LrhQ2EWjjawLmGxv5Pd9J","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 0x2050eaf04303b1c6e87536cd771b308045e0baefadfa2e5711b811f5fc5bd274. 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/7LrhQ2EWjjawLmGxv5Pd9J.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/7LrhQ2EWjjawLmGxv5Pd9J.
{"copyright_id":"0xe2d6493bc21a4635e1ede4fc8746edab0715f63fdc5f8f232f0854f9630ad3f2","isrc":"JPQ941500012","name":"Kisaragi Attention","registered_at":"2026-06-07T12:14:17Z","spotify_id":"5GSeGOPQYmLZMf0CaOaZLc","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d6493bc21a4635e1ede4fc8746edab0715f63fdc5f8f232f0854f9630ad3f2. 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/5GSeGOPQYmLZMf0CaOaZLc.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/5GSeGOPQYmLZMf0CaOaZLc.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788f7dc9d42db365c8fd2b5d92752d7b71ec2a79adc8b487508a5d7a09682eb5. 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/3oqP9fv15bVGVa87NHNdYy.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/3oqP9fv15bVGVa87NHNdYy.
{"copyright_id":"0x8654ce6a57dde257b11fe8c9b752bf9019f898de4da1ed1380a71063d1a68822","isrc":"JPQ941500014","name":"Yobanashi Deseive","registered_at":"2026-06-05T07:47:19Z","spotify_id":"0mkNGxmIlBCtkNeWr0PY0n","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8654ce6a57dde257b11fe8c9b752bf9019f898de4da1ed1380a71063d1a68822. 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/0mkNGxmIlBCtkNeWr0PY0n.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/0mkNGxmIlBCtkNeWr0PY0n.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad0aa0d47ffa59e2e10508503d20488a65ef4008bdae3252f083ff28dae7731. 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/7tNHQtzoO7OS56hjT8j752.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/7tNHQtzoO7OS56hjT8j752.
{"copyright_id":"0x6fd449ebd7d50392c22d2e7fec01161a0798b8db1c35aa1cc522dafc8f2cc477","isrc":"JPQ941500016","name":"Tomei Answer","registered_at":"2026-06-07T18:27:35Z","spotify_id":"2p4s3x2hPk2eNGGiipHEqR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd449ebd7d50392c22d2e7fec01161a0798b8db1c35aa1cc522dafc8f2cc477. 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/2p4s3x2hPk2eNGGiipHEqR.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/2p4s3x2hPk2eNGGiipHEqR.
{"copyright_id":"0x2d8ad4faad2e53be6566b7325cc2895deda07780bb2f4220bf98cbccf49cbd88","isrc":"JPQ941500017","name":"Outer Science","registered_at":"2026-06-08T10:31:24Z","spotify_id":"58BT2ZbcwwToftTMpkgS4c","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8ad4faad2e53be6566b7325cc2895deda07780bb2f4220bf98cbccf49cbd88. 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/58BT2ZbcwwToftTMpkgS4c.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/58BT2ZbcwwToftTMpkgS4c.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af0a1c97ec1821f4401116601d052a104579638f0c65c2db0ce8dc7906b6b5. 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/1ErvrGw5omZOwzgC4xyfJB.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/1ErvrGw5omZOwzgC4xyfJB.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc44d6e237e8d2f59862437c25c54e9cb3228f38635ad1c78cb94748bb88d925. 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/4q3X0QNKDgoA6JtElsInCx.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/4q3X0QNKDgoA6JtElsInCx.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344be65659ee8fbd29d43e240f0ab7b3a30cb7e4c6d24e644c379b596f573ba5. 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/2clXNIYMyjFD1jHIbAyklh.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/2clXNIYMyjFD1jHIbAyklh.
{"copyright_id":"0x4ac300f1118461418c5845e5e6ff4f34897656adf8c00a8da43d5d212afec64c","isrc":"JPQ941500021","name":"Summer Time Record","registered_at":"2026-06-06T02:15:30Z","spotify_id":"2HCbrmrmqLFVxKOXtLsySr","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac300f1118461418c5845e5e6ff4f34897656adf8c00a8da43d5d212afec64c. 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/2HCbrmrmqLFVxKOXtLsySr.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/2HCbrmrmqLFVxKOXtLsySr.
{"copyright_id":"0x4bd462ee9fd81e971c940c118ef12e935b692d2cc9cff28be992f990f808ba4f","isrc":"JPQ941500054","name":"Kachiki Na Kanojo No Sekaijijou","registered_at":"2026-06-26T15:39:19Z","spotify_id":"4G3seVOuBZjzax5wxx4Zry","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd462ee9fd81e971c940c118ef12e935b692d2cc9cff28be992f990f808ba4f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4G3seVOuBZjzax5wxx4Zry.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/4G3seVOuBZjzax5wxx4Zry.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020692e55df2be04069c67d7c785c6f49bcaadcdc0f256de46c83ebaefee81b7. 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/6mquzth5zan1nhVQByLMuX.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/6mquzth5zan1nhVQByLMuX.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003b2c5cf8047397601470b93542d06398c729eb424436d410990b11ca55ff96. 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/54YFzBlshXmQHMDetrC8g7.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/54YFzBlshXmQHMDetrC8g7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe724b4f1975ed8c51a770659302e84a3b4cda1b6314107296a40741e29d03e83. 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/5JSNVTy3twvLc9XBGsnj4t.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/5JSNVTy3twvLc9XBGsnj4t.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6af0a1c97ec1821f4401116601d052a104579638f0c65c2db0ce8dc7906b6b5. 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/0bp8LIVsTpLflSYF5ZtzsD.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/0bp8LIVsTpLflSYF5ZtzsD.
{"copyright_id":"0xebf51cd9fa29af438952939e4bd172c28d497f6eb0ec4f7c74cafec219efcced","isrc":"JP92Q2302046","name":"夜咄ディセイブ - STUDY WITH MIKU ver. -","registered_at":"2026-06-10T16:26:36Z","spotify_id":"1r3vtnmZZfztXN3ci0pHGy","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf51cd9fa29af438952939e4bd172c28d497f6eb0ec4f7c74cafec219efcced. 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/1r3vtnmZZfztXN3ci0pHGy.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/1r3vtnmZZfztXN3ci0pHGy.
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{"copyright_id":"0x27632c5c2c2e0fedb5191daaf8694a83691aa773bec656be5be19a040c6ada0a","isrc":"JPQ941200003","name":"Nihonbashi Koukashita R Keikaku","registered_at":"2026-06-20T23:38:03Z","spotify_id":"6I3zUfYRe92LBcaM7sPwbL","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27632c5c2c2e0fedb5191daaf8694a83691aa773bec656be5be19a040c6ada0a. 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/6I3zUfYRe92LBcaM7sPwbL.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/6I3zUfYRe92LBcaM7sPwbL.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e58166315613ac158526a1c367f978b7df81c2eb6433d117ff8af1404b0409. 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/1dnrwyTFfCbLt9tMgZK1e2.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/1dnrwyTFfCbLt9tMgZK1e2.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a7d7be2866fa11333e5d4ec9b6e3c645311f9717eca2b679ae641c87082c11. 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/5buB3pH2Vkkg7ZPPo545OE.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/5buB3pH2Vkkg7ZPPo545OE.