Fuka, Fūka or Fuuka may refer to: Fūka (given name), a feminine Japanese given name Fuuka (manga), a Japanese manga series Fukah, a village in northern Egypt, referred to as Fuka in a World War II co
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 0xf811d560ab2cdac1e125729a89a9c5b056634228878d4a29f9466c74c96e5509. 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/6de00a1d-fbb8-4b4c-a664-f0ef6d625787.json and https://artists.proofprofile.net/proofs/artist/6de00a1d-fbb8-4b4c-a664-f0ef6d625787.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 0x2528b9cc71e39b6313705fe476845f9e44f37eb855c078efabfee7daee6016fc. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN42025293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c43abcca31d3943f7fb6afc4c800788139412c06b18ef0b506513261123d65a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNB2012736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fab69a56bc1001b65add81387c2a6a3b1038303869f31789edbb32443f5d653. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CLKT22103800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1c23e89ad5c4a244df621778726bdbc12d6cede8337026f117e1f13d7be4de. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/CLKT22103798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bd447d4ff0186bea68a758610f66d6668ba3845244678cd5d1aea02b83798e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CLKT22103791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c1e01ff7ec5b915af1bd811f5fbc36b4f10ae709e0575a9385a2e8121f7a13. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/CLKT22204154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6d24cc6bd5ac08c4969a77b8175a026fbca7d732f4ec477a48bf589f120000. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CLKT22204212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f093ad83da52107bdf68fe225afd42d22c566e2eb6f64b674735268da6b9d8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CLKT22204213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ead8fe422ee4d71e8298e10a17d938ff9557c9f9bd3e442f0f87ace286261c. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:55:23Z), 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/QZFYY2366374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1d4b14e2c3eceeeaba7319c3c7912284884c49a6ae98baa5d045af97054e85. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYY2366376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294430e936c01d51827c3de814039f5396ab37878843ec77256c65aeeb566a2d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZFYY2366378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3994a3f0a4dffc8a2cd51e33e95c5284fe5ac64ee0519032875f579f7063d99. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZFYY2366379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1351e4578d511df7c1772a3adca40d722a2bc5a029194783b39716d073dd0c2. 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/QZFYY2366380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4381cbcb003293f4e9527457c317f0ce4281b43f02358e79cc262c2ffe988fcf. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYY2366381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d3a9906888af6c85675b8e919adf387e084c785f96d460b64b56bcdbe7539a. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:17Z), 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/QZW9L2387193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c77e29257690abd88cdaaf4c380f10b0026c321ca9c640c9c67238d97549e86. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGLS2447177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d7a05f64e846b2249fa70e8788052cc4af7691b70e4fcf5f8955e3cf9708a4. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZMZ92426677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa60cdbbb5d5d88b27809c5450c5c68cd70a0c488e30136da1afcc8eb444ccf2. 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/QZMZ92426678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4f4f477c88150c2af14000ac465a541b22931f6baa0f5571c9172f49e337b8. 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/QZMZ92426681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532fec247a4639b31401392e4cce9f8a0c63bc2f6dfbce34bb548ad56bd73497. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMZ92426683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb690cc676e60d83863fb9be26f612c8ddc275778d412017b9a9b312f5bf65a1b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMZ92426684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c77e29257690abd88cdaaf4c380f10b0026c321ca9c640c9c67238d97549e86. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZGLS2447177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caec014de6e5116fda73c3b1d8ea14f0e0706b116a2bcda814ffb17c952cafd. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-17T08:46:23Z), 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/QZW9L2481233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2b00fff0ac1c4957da3de856c3c0b2b0e71d8cbc26d3e93a380afc01c5c044. 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/QM6MZ2472253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2b00fff0ac1c4957da3de856c3c0b2b0e71d8cbc26d3e93a380afc01c5c044. 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/QM6MZ2472253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca67eb7578e7fe13c864c97dfd66d3502c963150737b486e738b12630c99aa3. 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/ZZOPM2241156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d94a5efe751507acd543af9ca3c4f002132dd9239e5a9525e34f33ed1f51248. 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/BK4DA2401915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633b462ee76a0b02f6072377182f5cafd346f0254b9b3ef527690a924d1d9b36. 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/QM4TW2350439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d3f4377ec5718872e3f451556b3d88b14088c8aa0d9a507fcf9bbfd88f77bc. 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/CLA352300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66bc8dee3e0f202113f3e85d2029dde3084854c1fd0c471f045347b7e30f6b4. 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/BK4DA2417343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffaab022887fc4788f25b1e549aecd12860e56d8ebe9949d148ca63d622205a. 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/QMDA62317214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee002b052a5aabdfc7aae58ec230b537f11d7ce1f24b1a740f84b6e4425f54b. 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/ES5152500361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32f76b44ea0cefa2d0ece66b68a667762c0a9d4fa25274f5f5559dda2c64d70. 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/GBLFP2370625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d20f0e730e95ffd80f0ca8950f1c346fc45ac2806ed72e952f152d280537c9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM4TW2332767.
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 0xb808f81f83443ec8eda1d4bb93eb36b43431b88e06c688d499283a343a6fb2f5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMFME2378755.