, also known as , or simply the Japanese Mafia, are members of transnational organized crime syndicates originating in Japan. The Japanese police and media (by request of the police) call them , while
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 0x097b496b9b9fa377eab6bd11bcf1f266910fa996582b501157511e243ef3fc1a. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/535cbcba-947a-43df-9e7c-f3f4cebe9e0a.json and https://artists.proofprofile.net/proofs/artist/535cbcba-947a-43df-9e7c-f3f4cebe9e0a.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 0x196e7d833beae8b209210fc7f0f312c53facedb5b8a68338e32b563e15454ed7. 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/SE5752473590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260e938ade108866993303b86ffc171275488bc35ebfe65a5795459f0cdbf356. 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/SE5BU2364313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a9ec3ba6242ba8a8a399415852f3d18fb5bb2d9eb51138c51ab99bd86bdb44. 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/SE66N2229590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21db75578dd7253e839f1f8a4613d5080d7c5340ed4052e721374beef128207f. 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/SE62M2207438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c2bfa5505eab704cdd7b25d4e497c2a838314704de6d4a43432c9bf1bcac5f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/SE6SA2210089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f58cfbe7d65dd8a41ba8a685887b972d67f4155ec9900103d4890a53a8e551. 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/DKAZA2200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cbdc5de817f0d60bf5d4f5dd904a3efd295e0ea9b99377c384fbe7a45fb2c7. 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/SE5752264567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018e9da36e0d59d9bb8d06f940c0c24005b73db2426251ce76b694a73fb7eda7. 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/SE6XW2181975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93e82651f2315d84a2d18182a152c490f62f55a58bcf4a5b62bda22d79cdd62. 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/SE6I32115226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b46ed8c5cd85b2b5f1ff86d94bb438be8741c7a4689751d0dbf1cfc88044ed. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/SE5752106320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6ae9875e26bbece9e6a84be57f2f0217f81990e2ebdcc89140501036a38af3. 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/SE6TI2027298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78feffdb7132a7a4cef2463281803475ef1389e0fd132501f2fd283a0c5db8e3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/SE6SA2053030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4d453f070162a8941dbe7f3f1e198bfd0cb41f8a1d844ebf638f9bf6ccdef2. 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/SE5752085276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fe44273e54d356cb19d7a0d6db31275c212c0b412f9127b4c105675cadc324. 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/SE6HN2090688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e82a5dac47974581df216acc926c4241d8ff02be6480f8cd46c019ec94d05f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DKAZA2000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023e9dc04a5d59e86f1b10d403e5722f43955b1e0db37e1d03226676ab4084fa. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DKAZA1900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684df1bc72ad881673caeb98dc2dfd8e82231d65856de43480a7db8a63f7fa1c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/DKAZA1900155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5815064181c447d606bc861ad2e4f30ee3d3883fdcb68577af1a6bbc73ec82. 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/DKAZA1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038269c3e9df0d3be39bca8aa8de29cc4f212c232ce07a1efffd2241466c66b8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKAZA1800459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef78f808a6686c955acadcd136b6407da285fcfb6262850e04428e76c873b5a2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DKAZA1800263.