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 0x9b5843a6167b5c1c8c8f01360c047112626dacc212ceccb7e268e40389aeda85. 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/2d651299-29aa-4ab2-a66d-9f94d80bc7d1.json and https://artists.proofprofile.net/proofs/artist/2d651299-29aa-4ab2-a66d-9f94d80bc7d1.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 0x3a9f20dd1e2d79db3b173e4b3de1f191757c39e024826804688beb1e3e7effd2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/JPQ941200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabdf2ac8c8f006fff7725ed7dfd1b6a910efb6255e2783a90d719b7463e6530. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPQ941200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd497ab59e431542039c5e6d7eab5c3d0f0a0e1e269dc7cc060f9ca47693539. 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/JPQ941200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e33f5d4c19515aa928fa0ba7c1f51d3687e276cebc50d743ced5701e54cd21d. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/JPQ941200082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0597f7d58c2cad95c5f372585b0516fa43a9f893985e177d0980b6c260b0eab. 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/JPQ941600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b77a4a2b9650d9f1af170d182d8a98afbae4b2e16f81f86d030b5d2dda9b05. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPQ941700001.
The Beach in the Moonlight ~A Requiem~ (feat. Horizon Mulberry-field)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976930b8cc1cd49742e04096b45a12a57fc4369240948da38a0d2b467c3b3ccd. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPP2143059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd5e4ac57cdfe9fab224254d8543a5b9a69aba3a6a192e2a052734753163f0c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPV2374447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4173e9f1398075c3ca348944b75a264ddf58827c70f0c2974f139c080b236289. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPQ942300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6f37f4380910e84412b5225820e8b0825a5b19906b54c5b12149815f8b2961. 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/JPQ942300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca10f50a39f52948ff7bc9f57b4176e9daf58599b51a8373fb0b8130cc6cf88f. 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/JPQ942400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4173e9f1398075c3ca348944b75a264ddf58827c70f0c2974f139c080b236289. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPQ942300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93120a6553cbe1182b4b07cac6400f99fd5857d787372ed27dc817ea58bbf0ff. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPW462554974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2c75d0001d70eed144994598842f3f5269800d45e46512fbb82ed0b8f80c03. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPW462582884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afbbfd3c4a7fd22ccce8ba38e18ef040429216dc9c0acc8696526f667623cff. 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/JPW462582885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0235bd61e6940c09893c446ad4c0483d4eb94c8d671b08590fcaf2bbeb5800c5. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:24:30Z), 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/JPW462582886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7776789ba8b0aec08855572fc929209a2f311c3de141e189a7a8e05601b8b3e1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPW462582887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a044dfa43e2b369dbe6ebc759d8a1f848aaaf730c71ecf671d79c912752795d. 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/JPQ941800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44e938d2299f24f45e4eb6f3d6169d0967f69e521640202f6db81f267e96aa6. 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/TCJPL2064968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8621524b112854d88aa4280d6b0a733621e16d4ab06eb842b3ee037aab5b4d. 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/TCJPL2082042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4d629bd8911fd2569194676b53755060917af2f5ed740c11925c3cfd01100b. 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/QZES62300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16001e254f508db8de7fdf3a8240e1f4bd2138d46d72b33c1bad1527c9acad4f. 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/TCJPR2213372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62a3b817c0046969277ce8963ca37a62e90b2e94c273cd916c0bbff976e9853. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/JPQ941800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9566e338ae887d59f0dadb9e9d72e9ca236d1fe67864c195fd6304e297900663. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCJPG1894383.
Rokuchonen to ichiya monogatari (feat. IA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c23e83e005f64200382ad07beb99d70e147a9a2128589170c24251401e462f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCJPQ2284677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6c16583464f45306fe144956d7dbb14ded0d50ae77de9bcefa096decc6065a. 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/JPQ951700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45727900f5502de76420bab9ab50efe2e6f6e2303c1941928bf5992310e5e5c. 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/JPP301301110.