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 0x7d9b27c1f2c1cec44d62cb6708ed4982265c554302174cb21b15010ce4da48b7. 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/abd21a37-baf6-4375-a8ed-a821e03854ab.json and https://artists.proofprofile.net/proofs/artist/abd21a37-baf6-4375-a8ed-a821e03854ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
DIVAピアノ 〜ピアノが奏でる、歌姫たちのメロディー
やさしさで溢れるように - Originally Performed by JUJU
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 0x0cb85da2778e2b0fe698e97390e8a17fec6bed9109e98c9ff8960945e425349b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:52Z), 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/JPCO01128530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753aca1fae2cc16daa76aa232471af9ba1c6441c320a2b518ce7f14d78cacfcc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPCO01128560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48396b94db4be5e4fcecb79c012629a41e89602bf51e5f6a97fcc30c7d3bdd77. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/JPCO01128570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb49e18352199033c5ca9c56782320b8be5cd165a36c5815cc63436644afead. 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/JPCO01128610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de95f33eee8be81a598ba0957f7da922d44ef02b38d4309964a573aa6026582. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/JPCO01128640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40464e8317fbf10c2609556455863c38fb4844eb84bfe059d313edbae9fdd2e6. 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/JPCO01128660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542d2ad8426f212070516d2e8ca05e8a8f08df4e2c402500744873158f59d85d. 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/JPCO01128670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b716787a4336ff280d872e57c88c39a55c10a824e3b20843bb01c0473edccf3. 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/JPCO01541240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2486a4d94339e44b338e74a629f8ed8f91412aff75b8f0ee09fbd3f34e99c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/JPCO01541260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d38f539df2b5fa224fe2ed2e3bfefdf9a1b8b2bde7e7874f29323e7fce1351. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:24:19Z), 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/JPCO01541280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05da2140b66f6f6230ceb866feda4c1ced7f2ab8e0250d64deb60a5736a6e64. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/JPCO01541290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b71fa9c9fd111e72805bc96074851382d2b3b6cda6bd3c3b224e542e77c2abe. 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/JPCO01001320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095bb281cb31f365878a72242dcfa9cc746e480b0c6d54a5dfa2fba142846997. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPCO01933850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463145b5b6d9e67ea00d1d5a36e9c22c24baf9bb1dd72ba8224a91b1fd55ff3c. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:49:15Z), 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/JPCO01001240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8d376afa43e92bf09eb562eefba5e7914e898792dc176056e40940e95f971f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPCO01001190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad9964e3e9547c973ea32fd78b4ac3c78a5eab83c6168005057009f706f90a2. 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/JPCO01501610.
春ピアノ 〜出会いと別れの季節に聴きたいうた〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597021b86c49b653ff1c4f764a96206c27aface84375eab0a671a35b5055705a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:36:37Z), 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/JPCO02100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8038d847008cb4c2ce60b0bed96420fcf1a6686b1949c42f18c872ec2f2bdd38. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/JPCO02100310.