thumb|right|Flag of Kaientai thumb|right|Kameyama Shachū Memorial Museum The was a trading and shipping company and private navy, considered to be the first corporation in modern Japan. Kaientai, o
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 0xb1b28c820fbe5415b77038fc2802dd8918b4f81cc4fee6e4725f3406e2dae9d7. 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/bf15b317-ff27-493c-aae7-99354a365d6f.json and https://artists.proofprofile.net/proofs/artist/bf15b317-ff27-493c-aae7-99354a365d6f.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 0xfa4ae3754525241bc12be7b32a7a49c0ba9ce041b6645693e1d6520eef041889. 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/JPPO01112110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37932d7a3a685d88cdbc568efed6675186f9a9a28fb829eb3d29fc4c3358f140. 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/JPPO01112180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66746ec75a82f5154e9d5b562816495db4cd1684ce0b5d7fa50cce6d446c5c0f. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPPO01112200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3865873d3b61427026c69bb6d3538842605338b60df6d461c7439f2ecdf00458. 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/JPPO01112210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930abfe35f06794f7dcba855eede1b622a00fab3dcb6384b4fe12f68e48a88f9. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPPO01112990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615be79072f6e6d0fec4b47d06d2a89e369e1d53e253433258c4519ea69db501. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPFL07312390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fb46987f11fd7a7cf646109cbf2b04a9e10e0c08098a9f96169833f9076cde. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/JPPO08000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca7854ba1d9a6542361e483ba669c368c9617051210f7d496dc82f24f33680e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPPO07900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39465d53847bee5a279495686f3c02bd511cb5ea07cf3802a71141401a3d9a0. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPPO09000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a662f2793467558dd8c1d09ee111b479dac45edb8c6fac9e6080fd4ee9abe3b. 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/JPPO08500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x747a58b9091400f7ca016c0f41a120f9d4c0b3ca818c05eb0a58763401483f80. 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/JPPO09506990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5057c26c83030b642418da5ad2330cc9a41c9f51d46a719cf1b9742f925277. 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/JPPO09705110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ceee33244d6b6425205b36c3a877e1726106861c8c3dc417bb2a77d575b2d94. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/JPPO00108280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143d94ea13212eb0231c9f33f0bff0996ead08fda912cd14326fdd23f12e38a6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPPO00425650.
光陰矢のごとし -3年B組金八先生主題歌集-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a300d9bedcaed39b2cdc6b0e94f2bce3c1117c4b42d5915a7611d71590743ac. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPPO00431210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d18b5429a89e2353be862b16f87a8a9cb325a8ddd72d0c5e60cb4805f2f531. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/JPPO00431230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143d94ea13212eb0231c9f33f0bff0996ead08fda912cd14326fdd23f12e38a6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPPO00425650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67160c33c302ef51611542d4eab63e3498c39b9062fc5cca45f587e77f165d7. 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/JPPO00804890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7846587f5e9803a9bcf7f4a46277f1fac4e316b37e36abe09778d9f982709f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPPO00804900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15e2b477995943a22a032ae715f1990f61400bee08263c0a2b11dc87d073292. 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/JPPO00804920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3dc24878d498ca1ce941779b082e397ff2459f4219e09c4ac89095527e3341. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/JPPO00804930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31a4ffa5d4daec562d3fc554d434d85647aab9fb66fa5c51db86422466b187d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/JPPO00805040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90dec325d846a8f460ec7f13ad8831ecb371ff1f58000107ebd04b9f653dc20. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPPO00805050.
去華就実～花散りて次に葉茂り実をむすぶ～ (デラックス盤)
去華就実~花散りて次に葉茂り実をむすぶ