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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53496a65fc4a32e8aa76d90c575262d32c167e809ddb716110b841b3b1300cd1. 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/0a927b16-4688-44b8-b4c6-6d586ee8787d.json and https://artists.proofprofile.net/proofs/artist/0a927b16-4688-44b8-b4c6-6d586ee8787d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8971a9927ee14cf83dd0b803dcd25edfefacb82371c230d87363f00881a0095. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPD720601401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fff3785d731b62858d8593e777175a692d7cd42016668e559d781e3addcc6cd. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/JPD720601407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa564ec6b615d87313d99b164335886c7f31e841bf5179836319ebd1d57fd8bf5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPD720601409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29855648a79e913d3a50ff212d3583d974f31c54692dcff5fdbef0aec3446064. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPD720602304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d5cd529d68b3f73fe6352a75e789a33f9028508c57ec69ec9108532ac14310. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPD720602307.
オカリナ マイナスワン - 悲しみの果て -
世界のうた こころのうたII－アヴェ・マリア－
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fcf3122b912c2e370e6045afb1351a5e823c6014016d372a825d62e449bae1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPPO09102630.
オカリナ・エチュード～宗次郎が奏でるクラシック名曲集～
オカリナエ・エュード3～デュエット～
日本のうた こころのうた 第一集 -知床旅情-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6688080e9bb2b5ef41a8dd0f4bcb035902c7b41a2c44a343f738ad6feabffc. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/JPD720602409.
Japanese Favorite Songs Vol.1 Shiretoko Ryojou
世界のうた こころのうた 第一集 -コンドルは飛んでゆく-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71ee920dd96194138cc99e81f542a105d7ae54b9cb0532304661768c1d2c9c3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/JPD720602601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d7c03499bd8684ff0540ad1442dbe560b16e1009aedfec83d412b76df95071. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/JPD720602602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d5c5b95768dc05534fe38384a58fa69bf03fbe5216de54c24c11cb3e44d831. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/JPD720602609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93df2f5420808352507bec9a50d1eea8f4149155f54424e11b1a612396a7fd6f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/JPD720602613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37aca0466db28783a16ef81a6c65e329b298694628966e55d38790331ae4dd56. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/JPD720602615.
日本のうた こころのうた 第二集 -赤とんぼ-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166d6f1abacb048f68d1faae663e8c49c6cff15676bfca0935ea056af5dd1561. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/JPD720602801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed47ea12bc61da37fb3cf3cb8ca24d0ca7775b800642fff6113d1124a4cd35a. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/JPD720602802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e67f447542486a2454d4dafb70b6345235a07605ec63d87ff2ddf4bd41d8a2e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPD720602808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf022d94af52b15731feea6f70321d64c15509cccb30b1ae2b7429b2802ce95. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/JPD720602818.
日本のうた こころのうた 第三集 -われは海の子-
Japanese Favorite Songs Vol.3 Warewa Uminoko
世界のうた こころのうた 第三集 -歌の翼に-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337e2c974f456c3a1a79347a6befcdb46b5e93f87e57e24b3662e77245375ce. 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/JPD720603908.
The Great Yellow River Healing Best Plus
日本のうた こころのうた 第四集 -しゃぼん玉-
日本のうた こころのうた 第五集 -翼をください-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e5f6e2820d23e4c6385b55c946b6a928e07b9a638340e714cdfcc8d3ae893c. 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/JPD720604302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cb6c90fdc415a83f4eb9e37c2eed3ea305417da6424ff13382554b6deccab3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPD720604310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24268becef7b263aef27d263f1b5db478ad3b060f8222c265d70ed11b6e01e66. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/JPD720604316.
ゴールデン☆ベスト 宗次郎 オリジナル編
お家でのんびりカフェタイム オカリナ編その1
お家でのんびりカフェタイム オカリナ編その2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74e906aef6c522e8157858e5776f721ad890b3b0543ae44c016253627ebc427. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZPJ32313006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fcf3122b912c2e370e6045afb1351a5e823c6014016d372a825d62e449bae1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPPO09102630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89991d7d248c58afbe7fd6dd306a2aea2603a7f2f438ed60e194e8d0c1b867e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JPH711100586.