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 0x4d1dfd669b7e6a87274c73dfbca7005be62a9db4668863ca2009cdac6dde95b2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9f4461c-a4c8-4580-8d84-97d4b0f1f369.json and https://artists.proofprofile.net/proofs/artist/c9f4461c-a4c8-4580-8d84-97d4b0f1f369.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec583c7e2ada5321bea9bef355f843d6a21e892ad946e95d79d6f61b839864. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPJ901607960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d2dd171ef0b90b971af574eaa394a04d8c8ba579745c16d709ddb24d2f4543. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:29:48Z), 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/JPJ901607970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49610ead9287bd0784e77e21798bc586f356c9bb389a1e83f60299ad37a5c42a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPJ901607980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe53e150dd53fb48baf1b1c09f9710742e26c1d08de390f9e3c3e041a1d60fe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ901607990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310604daa85dda30684c083d9407e73837008a34d5630f1666802238f89120bc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPJ901608000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c9a570b59c8104eeb1d59a88e1aa1ed03d502a42e5036e4d77f28451ce2780. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPJ901608020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d4010b9c7c3c9d51a8805643393a6dd87b91cf2a2b92f98e08d29ab94d2333. 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/JPJ901608030.
耳の聞こえなくなった恋人とそのうたうたい
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731b58c8900e28e77142b26e0ec6b5ea48ec55a1b67bb52f0b09a1ccfd9769bf. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/JPJ901608040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1988b2c45cd8c571b6ea9c980e3a167760e092bb7e5d3697130da8a822d59af3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ901513410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2989c8844ee39dcdf8c1bf6f08d4a1295fe386ab6ac170fe52e3a9ad33669d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPJ901513420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382b581f2dee40e9571dff57f1fba2d06d81105cece32382fa979035d9a78cb6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPJ901513430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69b64e0025f01358f81014e6193a1e8f7bff4b509b57e8b244dbb3f8afca2c6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPJ901513440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7592e09512f1e038d93219967cd88e1dee39e46e634900d4f5d9278b4cd4b71a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPJ901513450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd35c3aa2b105fb28659a9b973bf4cdddaf1f91d7a5251facbaa29411fe1137. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPJ901513460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae8aeaee52a9d9f58d5bc5d8a2f15d02723e1eb48369dfbe2bb992fa4a62f8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ901513470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1c52cc60f7c2b99a9cd37b56f043754ea320616eeda66e5b2907a6a8a6dfcc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPJ901513500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28846d995c784f81479a46e54de02ea1f473374d76335543fbcf3562055cbb3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPJ901513510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264bcd661f2bc66d64b124b2af889c104bd7ffb2f8e7f323d8f7b97e6179cd1d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPJ901513490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444b91fd20e97d99e48c79e0360538327d0462f6a7e593f7a785ad9ba13da67d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ901815170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2efe0ef8060def1412496f1a0b35080267ee9ee26d58a4c809d07c7b993c7ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ901815180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d71b18e0c80c782517f53f4abca45cfb64892787130c7e70514c20047d6ca31. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPJ901815190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0264609762650e1551e78e260b49b502e4ec07c7a49c921ab87ab0d8daccb04. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPJ901815200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dc2f9bc678a04c648d160d812ae324875a383d460bf9aafc36562201b0f2d7. 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/JPJ901815210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e59858e7a5711c3926d78a3d1a8ba07dcfbba255ce3789597b48a917879bf. 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/JPJ901815220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d1fc0ec91503793cca0e8f4c7582838bfc575eecec4d5c6e2d532d0b468100. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPJ901801250.
ようこそジャパリパークへ（弾き語りver.）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95463a3a8a9cdfc153cf79b7a1e80bd184db36efbc26c5b10a80cc1cd06346. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPJ901801260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7597842dae34b5d3daba20a7e282f83b6dafe0cd4495429d770172844831e1. 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/JPJ901801280.
ようこそジャパリパークへ (弾き語りver.)
ようこそジャパリパークへ - 弾き語りver.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc95463a3a8a9cdfc153cf79b7a1e80bd184db36efbc26c5b10a80cc1cd06346. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPJ901801260.