1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 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 0xd7944750bd4fd8012b5baa53826e414a43049b78f4f235b56da9b9f6f5abf2bc. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4d446bc0-b584-42d7-bffa-f83317fd16b5.json and https://artists.proofprofile.net/proofs/artist/4d446bc0-b584-42d7-bffa-f83317fd16b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
青春アカペラ甲子園 全国ハモネプリーグ〜2020夏〜
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501580ffa1938c2afacbe7ef34dcf27abf3c366e894cd65ac78e5e8673220120. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592010490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75fce64a7d272b420bc89d1495646c694c5e66c7433dd21b68633bb1a0db5503. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:24:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592010493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c827dae4ea0d307eca61af95d90c7516623a81d579b2c7793d1a99c216e82f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592010494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3330b426905e50e326ea0358e16422d22ab681304d78547f9147821de2d9d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592010495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3fa09d1acc19f68ea3e765fec106c7fe3497df19e4977832f21855ba825463. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592010501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cdf15cba5d51c229fc5712602b794d9b75bc1e9584202f5c03f8087ab6bcbc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592010502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc90142444f8ed4dae07c4c9ff4214b8d6bcdcd81673234c50e99573d9c499f3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592010503.
青春アカペラ甲子園 全国ハモネプリーグ～2021冬～
白日 (ハモネプver covered by リメリック) - 白日 (ハモネプver covered by リメリック)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c5baa070d07a61cdafcc4bdb15b05566b42cf3db1a0354265375edbfee51fe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592110359.
怪物 (ハモネプver covered by ヤミツキ) - 怪物 (ハモネプver covered by ヤミツキ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c3f601cb1f16dde7a4fe07b5dfe369a6e47a3cfdc2fcab852fdfe0e4f41cef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592110360.
HAMONEP LEAGUE -2021 WINTER AND SUMMER- (Vol.2)
HAMONEP LEAGUE -2021 WINTER AND SUMMER- (Vol.1)
青春アカペラ甲子園 全国ハモネプリーグ～2021冬&夏～ (Vol.2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f7ddcf46624f961cb7f2d4c3561f803e99a07b3ed51f2dd9edb8cec09fd373. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351f7d5db3c0cbc43a6c9c3b24eefe96cdf573d74aafbdc51cffd04e58331395. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3420e494082bae88e7eacb5010334a0a7d39300982f5a18b5499cd3cc12862f4. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf814f429feb16577d14fed345033fa1e4c3d3ca53c9dd18d390eb99b9d68b15b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f493573cd8caa6ec78b8f53f56dbd5f1da581614404968fa9a49243da85ed94. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210098.
青春アカペラ甲子園 全国ハモネプリーグ～2021冬&夏～ (Vol.1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad86329582d1446d4eaee85f0bcc729e3846c68a2d707ab8edc6ccbc0c672036. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad75a09aaa74c87e3c8050323ce8785072283dd8d189507f28997ca13f1176b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210083.
タマシイレボリューション - ハモネプver covered by セルジャム
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12426585b422b3a98e344511a307a44b22887a14d4e5b2cac5839b93a9ff6e83. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d7a707755f0806cbeaba5855e27be7e94bc5020a88fb488128b1b7de85a424. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210087.
青春アカペラ甲子園 全国ハモネプリーグ～2022春～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e0fa2ad2f01ff788386d83793483d8dabe7feec33f299d377184a8157b8876. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ec5ad1eead1e7f8555949103e9d2ba1e6b5d9f8e6da441e14667caf70391c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a33ad5930885568b60fc5ee8098950068379290be08f182bdbf7d0838a6e4b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6ebee39ac1fd86c1af4f2f7025187b5213aeaa5c27a792a93ed223cb2fc857. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592210635.
青春アカペラ甲子園 全国ハモネプリーグ〜2022冬～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b3579465bd6719aea9e3c37b07c67f6171541a1de8c025d049d613a215db62. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592310117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66774b3a93e8a9392d899d2d96393eb24778a1513db9cc29cad1ec65aaad29c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592310118.
青春アカペラ甲子園 全国ハモネプリーグ〜2023春～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46955222bba01d64988634537f7df128f7274eeddcbd0b17531af8c24ae7886. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:27:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPT592410028.