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 0x6ce876c5a5986cf0f130d175eff5b000d8ef08643bf3879b37e33398ba971202. 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/e3cf669d-3a85-42df-ace3-e802f2abdfb2.json and https://artists.proofprofile.net/proofs/artist/e3cf669d-3a85-42df-ace3-e802f2abdfb2.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 0x13c394800bd5333007f7ad3263d5693cea7db76038bb7a3d95df4dbbca889d49. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/JPW561902009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08088b77678a8e0f98f4fee498e0c5d8439b44aa4dc4ca14767e214445d66028. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPW561907106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2671e495010ea539a02004a2df5086b2fea0c73570b628be8582b4b278edd6. 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/JPW561809077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2ad85e1e61173c6cb3a61cf8124000c5930ee1b9357a0972d336b6d06bc8c7. 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/JPW561804111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14762a57a621a8308d5107233bc8d0230225da97c90ba973fcb86bbbae8d8a8d. 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/JPW561804043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6ebdfdbc367396a1278a3082822073475d1c497696d59fb5f5a98f123c1541. 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/JPW561804151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fb672903bb524f5ffea9718cb480932654757b9d67b0d194e65520753a29f5. 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/JPW561804241.
Paranoia（DJ katsu Fashionable REMIX）(feat.花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7c569783a4662a81529b43a1df388d621ac1a44c3a7ddce7a1567f862c09ff. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/JPW561907107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e55c116b83de6bbb76c3640f059e6cfc0d281b83546050573829bb6a35a8b7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW561901920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18abd08c6a701d6b62f129bc3ad7c708bd1561991a6fdd95d0ecbf0af3deb39. 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/JPW561901893.
Paranoia（東京アクティブNEETs REMIX）(feat. 東京アクティブNEETs / 花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d01acc9bc5d65cec3a8a905e9d315f1ba97c7849a6a2bfc3fbc9ee66c92012b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/JPW561907112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9762fadffd58bd89f8515f71bf7d6d357e3efa70cf1f378e6c1b34a3a86ef0e1. 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/JPW561804114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7ceaa6f6f21930b5b4d2682af7429f648948d18caec49aca8d804506b81fc5. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/JPW561804408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b28a8f86e4cd69908d65c4544c9c21be4e05c9ca1cebc0798ddfa57ef8dcf. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPW561804282.
RAVER’S NEST 1 TOHO RAVE PARTY EXTENDED Ver.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab41854839abda548f3ed057833e9b7c547fdae18449d8787185d921f2ea566b. 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/JPW561907147.
ANGEL WiNG(10th anniversary REMASTER)(feat.花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61fa7b4f863ecdd167f2cb71f6aa20d29f3501566de7414335a2686067d8699. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPW562110768.
New Generation(10th anniversary REMASTER)(with.空音＆花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73464b286c7ffd7ac83abfe857e6f3dd85486a3468ddcc140727507a3c61e503. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPW562110784.
Dystopia(10th anniversary REMASTER)(feat.花たん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2324f33d225cf7b68c04bf29029c06bab3d70fab9a58b6f3711e6f9d1b979ef4. 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/JPW562110790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd89405bad63ed1d605c1f3997a64437f499ead45277425d148d39255a3bbfef. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPW561804446.