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 0x72dab2874c8822fa27778d1d9b8e4f10283782de39a2463b0e466c7ecc32793c. 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/6ad99520-b0e2-4c1b-88c5-32754d60529a.json and https://artists.proofprofile.net/proofs/artist/6ad99520-b0e2-4c1b-88c5-32754d60529a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
{"copyright_id":"0x5f86cac62efdb7f6c98b8c2c5efc2b8df1e3348726a67b56467bb5408aa1040c","isrc":"JPJ931700134","name":"サーシャ - Cover","registered_at":"2026-06-23T17:34:23Z","spotify_id":"4zNwAtOkF4UCbWjDoKhfmz","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 0x5f86cac62efdb7f6c98b8c2c5efc2b8df1e3348726a67b56467bb5408aa1040c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4zNwAtOkF4UCbWjDoKhfmz.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/4zNwAtOkF4UCbWjDoKhfmz.
ワンルーム・オール・ザット・ジャズ - Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1b068c0a1a31844566eefb6184d7917c32320d560645fdb46f3f811fb48d0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1KX2RSSc9c6EX4ciVYQrt4.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/1KX2RSSc9c6EX4ciVYQrt4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6dea2be14de08d0471f8495262a1bb7ba9c3c3fd804a4df8e421f7f37fd23f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3pjufBvXMt7OZCwfm8Mun7.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/3pjufBvXMt7OZCwfm8Mun7.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f86cac62efdb7f6c98b8c2c5efc2b8df1e3348726a67b56467bb5408aa1040c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2UhblHitH1bTv0F87rws44.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/2UhblHitH1bTv0F87rws44.
ワンルーム・オール・ザット・ジャズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1b068c0a1a31844566eefb6184d7917c32320d560645fdb46f3f811fb48d0. 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/0A8flN5lbtZV7U2V2lbcCV.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/0A8flN5lbtZV7U2V2lbcCV.
{"copyright_id":"0x7c68df40c9f57b021b2913d59562a7baeb9cfaccaadf9410b454254ed3b04808","isrc":"JPJ931700138","name":"For Campanella","registered_at":"2026-06-18T22:21:52Z","spotify_id":"6vBvHWXD15FbY2CEhpNgHH","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c68df40c9f57b021b2913d59562a7baeb9cfaccaadf9410b454254ed3b04808. 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/6vBvHWXD15FbY2CEhpNgHH.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/6vBvHWXD15FbY2CEhpNgHH.
{"copyright_id":"0x01c1b068c0a1a31844566eefb6184d7917c32320d560645fdb46f3f811fb48d0","isrc":"JPJ931700139","name":"HIKENAI GITAAO KATATENI","registered_at":"2026-06-22T10:22:01Z","spotify_id":"2y8MCud1tRcHBZwWlmpYEk","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c1b068c0a1a31844566eefb6184d7917c32320d560645fdb46f3f811fb48d0. 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/2y8MCud1tRcHBZwWlmpYEk.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/2y8MCud1tRcHBZwWlmpYEk.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6dea2be14de08d0471f8495262a1bb7ba9c3c3fd804a4df8e421f7f37fd23f. 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/6fOuniR42bu4oiv10HjXvr.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/6fOuniR42bu4oiv10HjXvr.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f86cac62efdb7f6c98b8c2c5efc2b8df1e3348726a67b56467bb5408aa1040c. 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/0mBpMmrEqkS6dNSScmNFId.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/0mBpMmrEqkS6dNSScmNFId.
Epic Seven Original Soundtrack ‘The Starborn’
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28169312f30b7be62e9d5613cae0d7e12b67cb7d09d7a6cb13baaba33de3ef4. 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/63xQasauY1t7nRxrh7ibxP.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/63xQasauY1t7nRxrh7ibxP.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11ea1e2c7b841cf0f775dedf22d02e5fca51f8ee85382bcb3eac030e25b4e5. 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/0X0AgdLSsbY78iNN8WJfW1.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/0X0AgdLSsbY78iNN8WJfW1.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b77a2f2bc8e13beaa6e57425c799b97b30c363a80fe95055c8bb24785f0c44. 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/0pJ5ZkMV39AyIW9o5KYz1a.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/0pJ5ZkMV39AyIW9o5KYz1a.
{"copyright_id":"0x680198530fd9c219f7ac5abb77bde06d87ebfdc38276b01927cc34b030790107","isrc":"JPJ931800202","name":"Happy Halloween (feat. DAZBEE)","registered_at":"2026-06-09T06:56:33Z","spotify_id":"7KUBRZq0UEDlGoNqTWDzAJ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680198530fd9c219f7ac5abb77bde06d87ebfdc38276b01927cc34b030790107. 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/7KUBRZq0UEDlGoNqTWDzAJ.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/7KUBRZq0UEDlGoNqTWDzAJ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081d77ece77d159e650bed9e219ff23e5a16cc5b95b5ea414627b1003fc779c1. 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/0fnlRva0o8MgmhsXgTgybs.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/0fnlRva0o8MgmhsXgTgybs.