is a Japanese hip-hop/reggae group. The name "Spontania" comes from the English word "spontaneous". In 2010, singer Kaori Natori became the permanent vocalist for the band. Members Massattack (マサタッ
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 0x99c84383b525ec8ef2631efe852d45b8156bf6903ae4ddfb53883c6768307000. 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/e1561681-7adb-4096-a191-69b11e5fe39e.json and https://artists.proofprofile.net/proofs/artist/e1561681-7adb-4096-a191-69b11e5fe39e.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 0xcd0c655d6d4d772ef7706ebd769a34e70ac51c893f481ff9c6d93c4260febe89. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPPO00865490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a8fee5c2c7fa85d5e8acfd64fee9e6046d2cfa9db66f1ac4eb13e3e86f73da. 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/JPPO00979840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e4b67e7e87b31fe2eaf41ac3bf049e5a92f1f069e2691506bc501b8dfa048. 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/JPPO00840930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6774dcaddc16e3d375588260ac74da997aee621c055fa686ebcc54369c46ea22. 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/JPPO00991260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eefa5c3f5e3c21259c66d7c180db39e0676b867539d20f8944634fde927b91. 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/JPPO00894720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32066335ecc843f83bffb4a5b46531ea6fac5fbdea6681394bdf0e670130c60. 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/JPPO00991280.
Another Story～AI「Story」Spontania Version～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd8c9162d89277a110e7554d02b0d0ab5cfe36a21745d7df4f7941d7e064f59. 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/JPPO00963690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023f899b3608cdf1159af3461fe04d0b2cfe3071e366baff876a85959dfce63e. 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/JPPO00991290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa308dcb9397ebf3e47eb775a979ebd7a729ec016400ce147c8ac4f687f4713. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:39:04Z), 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/JPPO01150748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e8af20409aa36a72479b41507c04b3fe0317f73d0a5cce4875bbeb31816084. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GBLPF6769400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa29d471aa07f0b8b4d998710d59d9e5f3dce01e704f32144963596cfd68beeb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLPF6769401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6f76934a9a5de00a9050c266d0ab76847f3be23bae564253328b7c7d419f67. 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/JPN300801821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e4b67e7e87b31fe2eaf41ac3bf049e5a92f1f069e2691506bc501b8dfa048. 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/JPPO00840930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38517f0f441496fa8b48c64a93dc0a2e99bffe464f8b4eb1a412be4b93c3a83e. 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/JPPO01092560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f66c22316c5dfdd4e17160ad17caed17198d9b7ee38ac42f86e76b0b75ca54. 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/JPCR00905160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884fd9e7708549d16557a1a1aedf9166660e45393c1da6421b6e0c12c83d43da. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPCR00905180.