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 0x21dc282fd2ab80c833609376130a1b41beeb8a713170de42cb4416abb30d846d. 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/4d2eb9eb-1890-4090-ad17-04cee24523b5.json and https://artists.proofprofile.net/proofs/artist/4d2eb9eb-1890-4090-ad17-04cee24523b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
しまじろうの おやこでうたおう こどものうた
{"copyright_id":"0x8e8c2fefe19c47b0ca30d8dc080c3ca097da0acc926ce83a179a5f0037edc6d5","isrc":"JPP401500263","name":"おもちゃの チャチャチャ","registered_at":"2026-06-08T19:22:09Z","spotify_id":"12xs2E0Ws49qEKAEBkN6JI","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 0x8e8c2fefe19c47b0ca30d8dc080c3ca097da0acc926ce83a179a5f0037edc6d5. 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/12xs2E0Ws49qEKAEBkN6JI.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/12xs2E0Ws49qEKAEBkN6JI.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58270a13f5bd6f690ebd793e35fbbe8269f8ba6f41bd951d2e4db18b2e946212. 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/7fVzL1EDOkFx2b5AY4TgTa.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/7fVzL1EDOkFx2b5AY4TgTa.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7130995c95afa3bcced654bb18b63454e0f8f57ae346ad6511df9aa6ff38af9. 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/2z0vYaTgIAY65fFoZKOSo0.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/2z0vYaTgIAY65fFoZKOSo0.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0525b33f24f5aadb837b6e638be584e1eebef024679949a889bd6c661bd3459b. 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/66x8kER10x8Tp8rnaGkJyk.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/66x8kER10x8Tp8rnaGkJyk.
てあそびうたﾒﾄﾞﾚｰげんこつやまのたぬきさん〜いっぽんばしこちょこちょ〜ずいずいずっころばし
おもちゃの チャチャチャ -カラオケ-
しょうじょうじの たぬきばやし -カラオケ-
てあそびうたﾒﾄﾞﾚｰげんこつやまのたぬきさん〜いっぽんばしこちょこちょ〜ずいずいずっころばし -ｶﾗｵｹ-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdeb943ab7fe918d8905a66e784627332675c1073420643be98d55fca71904e. 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/4ccOlvL9O2JCS2HrvL3OpM.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/4ccOlvL9O2JCS2HrvL3OpM.
たいようが いなくちゃ おどれない
{"copyright_id":"0xb263faa551cf29cca86eff30b3a7fa698ea33edd3d05c0ddf20d7c7024f91acf","isrc":"JPP402000072","name":"たいようが いなくちゃ おどれない","registered_at":"2026-06-10T05:37:59Z","spotify_id":"5h3DR8OKxsDI2MzRKV4Pge","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb263faa551cf29cca86eff30b3a7fa698ea33edd3d05c0ddf20d7c7024f91acf. 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/5h3DR8OKxsDI2MzRKV4Pge.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/5h3DR8OKxsDI2MzRKV4Pge.
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