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 0x133c6d0e268334e3219906bd956527d84fb1d1647497935b2ee28626bcc435fc. 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/45589f86-1302-4f9f-8168-883b770858fe.json and https://artists.proofprofile.net/proofs/artist/45589f86-1302-4f9f-8168-883b770858fe.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 0x51118b92ad65e8d4108f24a1afce335d4cef70e3314ed8bcde8733f763f20b73. Chain 2 (Bitcoin): anchored in block 958724 (2026-07-19T11:19:01Z), 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/JPTE01806420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff967ce30f9f4a52b1418d4b623be04d0c482370874fa7120dc6746f2ce890b2. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPTE01806430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55819a7f423509015a440c30a1f54bbf82060ec10deec5e6531804c5af297178. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPTE01806440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d3dec81aa1d640dd2c3f4a9cff49b993ce26d6fc5d5165d12f40ca11cef69c. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/JPTE01810060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9fc339103dd4ddf0ec72f0fb2694b9c3736225f11d89ab625e8b7952b648ed. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/JPTE01810070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e654c265c52f303169084623ab2bf9a1e77c66ac6954456afe1ba1f499dc53. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPTE01810090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aedc76e48c98946bbee24fed30ced93e9574184dd1cab780d7f68429e36c4e1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPTE01904060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c27da98a3c5106edb6fc04fe7fe016e20c1809f309f4d088785f59e6e5d1474. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPTE01904090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e9666a1ee4093ef66525022643ce38de493503453c9b9f24b1d2368f39f656. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/JPTE02000790.
伝えなきゃ、届かなきゃ、君に聞こえなきゃ。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28033de8b18929c40b7d593d2f2b1f697ac1066defad6d8edd85bcfc67acc326. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JPTE02000800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8227d46fb16e62eb9d78ab2017b53dd4e7578e81576882a73315195d73edc6d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPTE01904070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b10a44ce443d275f7dd71aa64174d218a449e998e5310a207d30e9473718ba. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPTE02000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91ed3a333e107ac7d9e3ce01b7154af0e912d8dcd21713dc0e3d6fdb23d8d96. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPTE02005510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e9e15000ff9e86bf402a6337fa9ba4d73da2434a98f496e9667c2a7e0e81db. 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/JPTE02005540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307b11a11afdfa192f6c25935d4d6edf5a8a863ab8ce3f7a1ce99fbc1a2c539c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPTE02007280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc69662e445907c62d9ff3c32708f1b3159809e34fe22337f2471b57c562543. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPTE02102920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6846b6b1d3eca1dfb36cca5d1b8821d79cadb4c25753c69ad04a742ec63ab4d1. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPTE02103320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7bc002c8967324630f88731e592885b266cf7969a57dd86a76e16747b2aa9b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPTE02103840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fe98de4e4078c777f027c14e52615f88c0fdb6e0f608b112b5b7fba7bf87d3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPTE02105530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a452cd3e7152e2b962391bafcd01f19b4a88f267d8beba68fbe393dc9d2ac1. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/JPTE02200620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87501c8a7e4c2fe791f42d0b13c138bb4a86d786b6fdf0a93231b5e490a72e8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPTE02200630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83c65c5c12a9917e8af58ca87b6c1835f9ef883d652d3d5c4713ef45d929ffd. 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/JPTE02005530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7b6ddb9afc0c1921abf0218176e25249faddaeee8717f08432974adc7ca89f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTE02200650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91ed3a333e107ac7d9e3ce01b7154af0e912d8dcd21713dc0e3d6fdb23d8d96. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/JPTE02005510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fe98de4e4078c777f027c14e52615f88c0fdb6e0f608b112b5b7fba7bf87d3. 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/JPTE02105530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18323f7fca8b766a9fd0eae8196013451fd298cd8e6749e0d32423ec1a48ca37. 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/JPTE02202190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1bad0f045e20c5a631680366c3b0a1d10037569f44c0237a437c91734329e2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/JPTE02203260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb804618e5529a06db3dc10cc62b2484515107f15ca6dab3cc6a2b97934eb8f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/JPTE02204440.
made my day feat. Takuya Kuroda / Marcus D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03280ad3d5b5c868bc0b521a8baa773246c9458491deba4b9f4576fa55f0248. 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/JPTE02206670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff29ad8bcd95942374d8fe9ddc04d70984cadba8d1147fe0906f9841d9be90a. 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/JPTE02300070.
生活 feat. パジャマで海なんかいかない
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d25d207b4e7b5502bd6ed691b513f7bda10bb856983b6f9805b7a1d1ab71a6. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/JPTE02300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb496a605413e8767d4c2d10a31774d661daa7273c9627bbdc1915f0a0f7884e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTE02400810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d003ceabaeadf08c8d04f01f585ce739cd7e0ee0e752110474b4b64811c248. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/JPTE02400820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff29ad8bcd95942374d8fe9ddc04d70984cadba8d1147fe0906f9841d9be90a. 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/JPTE02300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba63dc4a868e6f2fdb5f4f1951ddb678d9c469144e9f070f8b22b6120f0047a4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPTE02400830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b2b28836d0cb7b9d8da8d913666e639e79ba9e1fb60fc82facdfbfd5083730. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/JPTE02400840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf923218163b38d0d87d60482059c9dad95516124be4ed1a251047f80ea67010. 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/JPTE02400850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c62379ea096f4d94864b456a2fc4aad91099288ffbb737845320ab8176d8ac6. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/JPTE02306170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de51d20efcede7a671cac3cc7a35701bdb3fb1a673153a91db6a8c72242d7d1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPTE02400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c14acfc04bcc9d83868a571d712f70757b38bcd6c020d96e14d523d67042cc8. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPTE02400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1bad0f045e20c5a631680366c3b0a1d10037569f44c0237a437c91734329e2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/JPTE02203260.