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 0x63ab5709184b024edc3fdfdf3374f475e82189383527c3b118cdd9de1f018289. 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/a8a817c4-769e-469e-89fc-b94d680f3bf0.json and https://artists.proofprofile.net/proofs/artist/a8a817c4-769e-469e-89fc-b94d680f3bf0.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 0x5f8bacd82aecaaa53dc71b312e514533f5ff8e53a04970e3ecbc1f5519d8d62c. 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/TCJPD1678786.
WORLD END CRISIS (feat. futamaruya shidare)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f220ac99ad2fea49a85ca761ab62cf951f329fb3ac8f05e28f75cf86b38c1. 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/TCJPF1717066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1dbe4b9c8862ffc9bf4a917836b5363cb242353d7ce1a8a4658970e261b095. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCJPH1872976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a80c91b8354ffc47119dac6b7572a6a8ae096e7fd32db4475d644ec712fb436. 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/TCJPN2001649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2090499d345fe3d810add81d76a2d4a3a095be3e13ab433fd2becdde655313. 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/TCJPO2168140.
Lil' Shine bright Three oclock (yukinojooyatsu solo)
Lil' Shine bright Three oclock (征之丞十五時 ソロ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d636e134ac1074ed604b4ed8e92524c91136733dda47d79afdd605664dce3d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCJPP2178121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a4295aa732969850c69165a9b439ff5ad2f79df8f942d0db506aa783e9b5d5. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCJPQ2131593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9821e650cba66eb9bf9ab0687a9070e74ba9cae92f139582345c6c27d97dffe3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCJPQ2131594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b54369c7e9e4f6ddbf08918eb149649922079a19104e1f76e119f4aa4c5d37b. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCJPQ2131595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4c7478de6e5cb46bebf8e111aa140e2d3289bcc240ab42d8be031afcd7f5fa. 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/TCJPQ2131596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e336b7687cf5f91aa6c844bcaa0778421d6b1dae6335e19b11c011a23bc81a7. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCJPQ2131608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b61979ab826ec1655463ade644cc342e3252510ee3652a624009a83f17435. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCJPQ2131611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b54369c7e9e4f6ddbf08918eb149649922079a19104e1f76e119f4aa4c5d37b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCJPQ2131595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ceccb4b49c2a2a73f22cfb09f27b61687eb77d9661e6bb310c8eae22da3f33. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPQ2131604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40ab73127d0dc138e317dba711c6c427cd682fad95cc96d76e4a03db6e3df67. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCJPR2273609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4025cfa21db522404e73fed3616e493df8ded0bf5d079191c59205a0b57dc2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCJPT2260520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0ef255e0bb01fef8a53558ee2dca53fbe3f7f8f5806d2d85bd790e91af699a. 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/TCJPT2260542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4025cfa21db522404e73fed3616e493df8ded0bf5d079191c59205a0b57dc2. 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/TCJPT2260520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347cf0d60098f6e04f27034bb745545a36c259f06512d65275ce53179e1d209d. 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/TCJPB2433219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b20e55ac2f88e6005c682f491cd72998b70bf540b03e0462fd6e530b921808. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCJPC2477087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b20e55ac2f88e6005c682f491cd72998b70bf540b03e0462fd6e530b921808. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCJPC2477087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe253dc7b1c9d8abcb09db7c325ddc1f6672b931619edab452f2f72f12b46e93. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/TCJPC2492872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe253dc7b1c9d8abcb09db7c325ddc1f6672b931619edab452f2f72f12b46e93. 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/TCJPC2492872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8c3c8ad15bbb1339990aad4e55ac778a7ef2dcad2dd0db715ac33c03271818. 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/TCJPD2540423.
Kyosokaichinari (feat. zenbukiminoseida.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cd0544ea05422dcab19d54b9af2d15eee5acb6cb9e05d003691448ebcbddcb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPF1720545.