is a Japanese given name, which can also be used as a surname. Written forms Itsuki can be written using different kanji characters and can mean: 一樹, "one tree" 樹, "tree" 斎, "servant of God (Shint
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 0x26e622c42f5ec4e097a622006e3c19c50b6a7409dfb2007e2515aa641215c0d6. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27477492-b8c9-4451-8aa8-3b757cd32ab8.json and https://artists.proofprofile.net/proofs/artist/27477492-b8c9-4451-8aa8-3b757cd32ab8.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 0x2e1c4818e85a87bf5c9c396ed60fa10b604514d40ce1c72d76c2a4a147713174. 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/USANG2450434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdd88721bf20bfc0d94938c89a5c843392568832189773822e07bdd7fdc0bba. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USANG2467105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9a1614751a50922f6b44b51bb25967ebb66fa17b85cc2157c6a030a455a1a5. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:24Z), 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/USANG2488812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54149cc258093e05e858c98ff0514106463da95c4eb2f88a4acda54c89f6202. 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/USANG2488813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9e7f371bec4b8b3c292a26096d8ceb081828709157b441f612d7a8123efd17. 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/USANG2488814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10eb790f9aeff9005ec21a9f240076062c2e5bb58c6838aa982bf97f6dfba948. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USANG2488816.