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 0xa52fc28c4780d33f835d4207b5ff2b4f6f058920de7277094b2cdcdf01f4486b. 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/53fb5f3d-30a7-40d2-bbc0-37441c62b0e4.json and https://artists.proofprofile.net/proofs/artist/53fb5f3d-30a7-40d2-bbc0-37441c62b0e4.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 0x1c90e1ee0e5b4c0cce1538744a709e938159431290b6e7f9169b04ae14dd74e0. 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/JPQ322400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e7a1757982d990bc6de9ca556c43da8e166883a336880eb9f076fbeebed1db. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPQ322400108.
Beast Beat!! song by Daihannya Nagamitsu・Koryuu Kagemitsu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26150ea8234cd43595b8bff85c8046d3c7d60612670a02298e11ffc15bb4757. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPQ322400109.
Maze of Fire song by Onimaru Kunitsuna・Ichigo Hitofuri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75033cb141087f3175b91d9cafd49213e24a43b19c9c508652359e566d5ae763. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPQ322400110.
Komaku no Oku Song by Yamanbagiri Chougi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7419bf2210c246800e265f2cbab1b5d3e6afb3d363fae2e165d7c6bc6adbacd8. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/JPQ322400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dbbb88287933f0f2dff7ade6e0351fce4f786d3986043960728655f5bf625c. 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/JPQ322400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50982604aeae22d767b98c047dc0189c70e0bc6fc182a0ed65454ba5787da7b2. 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/JPQ322400113.
ミュージカル『刀剣乱舞』 〜花影ゆれる砥水〜 (通常盤)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780b6a45d61c68c7e1c7c3a157c3c13b2cd4340f28eb93edc010fc4b89fa151. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPQ322400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950536a250a9cad05feaf129d2606f148bffb3e2e0edf920acfc9307ce39d073. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPQ322400201.
已己巳己～うりふたつ song by 大般若長光・小竜景光・へし切長谷部・山姥切長義・カゲ・時間遡行軍
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c05a6975a59653c8624cf4b74395f1c641c921806df7640e6bd2a5610239b6. 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/JPQ322400202.
研ぎ澄ます心 song by 本阿弥光徳・研師たち
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711ac77005204e6b45ad8c0716ee4489003ab75b9795f63fb011d17ddd7eae83. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPQ322400203.
已己巳己～どちらかひとつ song by カゲ・時間遡行軍
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ab21054efd28e9ea8b2409cdb99c895f7710991677d85fdfd26681f7df9c4c. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/JPQ322400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb567f64ebf8f8becbe68d4f6f3b31aba66d36fa48d9e17d6e082832896c89461. 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/JPQ322400205.
瓜売りに瓜二つ song by 一期一振・大般若長光・小竜景光・へし切長谷部・豊臣秀吉・家臣たち・大名たち
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee0083c6e80ed372b4d4d1da3286c47aad68847982d2243a580e4604d58dc46. 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/JPQ322400206.
瓜売りに瓜二つ～已己巳己 song by 本阿弥光徳・カゲ・家臣たち・大名たち・時間遡行軍
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe84504779bef971fb795d5015021634b07ee2b23ef9e6e4173f80b570ef054. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPQ322400207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c0487826a5ee2a97a0e385a924864290f41d957192b390147f5408a232edd0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPQ322400208.
落ちてゆく音 song by 鬼丸国綱・大般若長光・小竜景光・へし切長谷部・山姥切長義・豊臣秀吉・カゲ・家臣たち・千利休
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d81a85f9aec21aac34cdd36aa3aa63b95f8790c0a95d5caeb2071984ccdd61. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPQ322400209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ac2ee4b4294f3792e99ae72015e556feb2ab26ecd3038b0c62fbdc9281c6d8. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPQ322400211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951c9c82ac03901309b00ac75a774a09a0a12da6615aa882bce5a9b5df4a58f7. 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/JPQ322400212.
言葉なき対話リプライズ song by 鬼丸国綱・一期一振・大般若長光・小竜景光・へし切長谷部・山姥切長義・本阿弥光徳
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516d24dc1b707728f0a042963c38fc457529b5fcb56e9c87b20cc30c4659443d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPQ322400213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75033cb141087f3175b91d9cafd49213e24a43b19c9c508652359e566d5ae763. 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/JPQ322400110.
我が名を知れりや song by 本阿弥光徳・豊臣秀吉・カゲ・時間遡行軍
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0611a0f2f826d2ffa5a4cf543b559a73afa1f44459ddbde3abdb065e44680bd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPQ322400215.
Touken Ranbu：The Musical “Hanakage yureru tomizu” (tsujoban)
Tagatame no karada song by Heshikiri Hasebe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcf3a5cde856d251ee262658aa54aedd8d8c4aef29e06ec4ccd9378611b9ace. 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/JPQ322400197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf780b6a45d61c68c7e1c7c3a157c3c13b2cd4340f28eb93edc010fc4b89fa151. 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/JPQ322400198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ed4b0644798d8b60de48ec110730a99859417821589404eb8e142525a21dd8. 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/JPQ322400199.
Kizamareta namae song by Yamanbagiri Chougi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92342ae97b1deaaca910b0f915765cd305b1d67bf57c64756e58db648c3da96e. 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/JPQ322400200.
Hanano ame kimino nagori song by Koryuu Kagemitsu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2102d4270d461448e02598b081b5d357113a19ca95cf97a4a27462b37f54d367. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPQ322400210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e1bfbefc3e79f7e4f295acdb42e860861421287f273f658eac10345787773e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPQ322400214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c90e1ee0e5b4c0cce1538744a709e938159431290b6e7f9169b04ae14dd74e0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/JPQ322400107.