Lunkhead (ランクヘッド) is a Japanese rock band signed under Victor Entertainment and is managed by Chockyu co. ltd. The band played its first show during their high school graduation ceremony in 1999. Lun
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 0x4fabbe3b3bee76ca5a1166e042aa4372eabe4508f9110b9e3776d17c96ec88c8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc3d3de8-0e6f-412a-9360-10740ea42043.json and https://artists.proofprofile.net/proofs/artist/dc3d3de8-0e6f-412a-9360-10740ea42043.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 0x2bf9239a0e965fabd8fe8c8e5a356e51715fc06e886b465bc396b97e0d106fdb. 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/JPVI00330830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049071d3e0fd4741b78eef3d8539e3e9ea58de1bbfb8eb20074d80896443d90c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:47:48Z), 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/JPVI00502790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a5d944cb64362fc9663f41f3076c3f08208655521fa237fbc88b8937632b18. 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/JPVI00704430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399873d5328c418ac36d251f97a4bbd6e737f498c2964a1e19c4d10fcada97da. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPVI00628340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0d39ba49dc4eeba86757db9f7cf6f8abb3d99c9ca6604b0f707ea337b018c3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPVI00909860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f6d8e8a1ccd6e177f7134b1a466a46a8c5d5d681b9ca44d57a1d6c31cf7e0. 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/JPVI01035180.
SOUND FILES 20091128～THE VERY BEST OF LUNKHEAD～
SOUND FILES 20091128-THE VERY BEST OF LUNKHEAD-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f14d73565b28f6c4d17db6814d34aa7760cda3d41dd7aba307b6b4da020fe. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/JPTK01601470.
ALIVE ‐SOUND FILES‐ ～20090320新木場STUDIO COAST～
ALIVE ‐SOUND FILES- ～20090320新木場STUDIO COAST～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e4add5514badc5aaf763b495a9179d1b2ab36011949cb6b8499fca75824549. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:30Z), 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/TCJPD2400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e16dda3e99c814f025cdc2e4ed2da142b70aeaaffcfe8c517c574be97d4bb5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:04Z), 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/TCJPD2400533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b5f5644aff01cd956b0b008c8b36ff3a4785aa5d430cbd52ca891514233c2e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCJPD2400556.