Kiryū or Kiryu may refer to: People Yoshihide Kiryū (born 1995), Japanese track and field sprinter Kiryu Coco, a Japanese Virtual YouTuber formerly associated with hololive Places Kiryū, Gunma, a city
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 0x22f8baa99a73c641c759a8cff18de30f7e27b4080801b8a2cb923ea356fd5f5f. 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/83323aba-e377-4eed-bba5-ef209aacb68f.json and https://artists.proofprofile.net/proofs/artist/83323aba-e377-4eed-bba5-ef209aacb68f.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 0x13903156c683ed8e7a8b1941cbfca8eb66e56fb406da7bd379714fb7e61c246c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPR501925420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916e1b287b8db0cc864c35e766a275c685af4e11e48daf2d90dcf195a891578a. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/JPR501204767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f935c5591f1acdabfe35a7083df2f32ebef0534a055138f524d96c8b8adb36. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPR501204769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5d01e1f2f0377be9c539261f99acc537ba7c7fe2aab54a0f0846baf9d10915. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPR501204772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77dfa4b6d8c2653754bc6f2becf0d29eb80e1e264bc4730950baee0992477ce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPR501205660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b71246a564dc5428d47599cd0548eb9c45e703c3c86b197394e1dc70797dee. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPR501306336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28536506aec966dd91389cae585f0d48824db93a51fa4665dff48cc5864cc7b. 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/JPR501306344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8a3c6b6a2e6a7ea608741ff2de695946fb52eeaab044e864fe3778a1fcbe6e. 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/JPT671400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2881d7c4f4567c1fae6c20f3c660d09af54da0e4fa2b89c2d059292130ea7dd9. 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/JPT671400357.
Watashihakairai Sarugutsuwanoningyo (C-type)
Watashihakairai Sarugutsuwanoningyo (D-type)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac036420e8cab08023c69ccd7b9397275c7547415a61ccaa6f1da9973613bbc. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/JPT671400439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bacfe87f2a9f17cf3374a3bf31657532fa258bff6371242c82ec3db2e93a02c. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPT671400465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb55e033a2f393423255a778233d044a8811e3551a61ec3b9d204e0d84841efd. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/JPT671400260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fe1bba2a7e61c4b231c14d7bddbdf75d88ac9dc84f8ba3ab16331df02d98c4. 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/JPT671400317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30772007dbfdc4659627b670ae1ed71c0104187d58950105ba7e66b1cd5338a6. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/JPT671400538.