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 0xa78944e88943e09216d71a4b5a8c2651e6b25c93250f57d1491723006adf7d86. 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/f8183a54-7f1b-4614-a736-4344bc940025.json and https://artists.proofprofile.net/proofs/artist/f8183a54-7f1b-4614-a736-4344bc940025.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 0xc9f9f34e47ce60a3565121ba06bc9f02c267412928cad8dea8578dd7a19ea8c7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/JPG531600868.
Yowa no Tsuki -From "Fantaisie Impromptu"-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793a85acb72f62b39c8c61995252f1a436280337831f8f78df9068be6310840d. 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/JPG531600888.
Koi wa jorijori -From Grande Valse Brillante-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe0813c13cfeb502cdf80bf1968ac21b26fdf5d1d7c1d43c2dd2c445306034e. 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/JPG531600885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e5d0d3e41e5e1edab9af57017d9a6e6544e7f8271eb5d447ac7aa99906f52. 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/JPG531801226.
Koinu no Carnival -From "Minute Waltz"- - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7c2a0da99ba191f378c3f35c0f9fb0eaf09516b02b57bc54ae34d81125bf93. 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/JPG531701114.
クラシカロイド ショパン ムジーク(挿入歌)
クラシカロイド ショパン ムジーク (挿入歌)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f9f34e47ce60a3565121ba06bc9f02c267412928cad8dea8578dd7a19ea8c7. 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/JPG531600868.
恋はジョリジョリ ～華麗なる大円舞曲より～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe0813c13cfeb502cdf80bf1968ac21b26fdf5d1d7c1d43c2dd2c445306034e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPG531600885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ef7a22cc3c407fad5d377863586151f68dfcb684e49a2794563d7eb30303ea. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPG531701109.
ジャパニメーション英雄ポロネーズ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e5d0d3e41e5e1edab9af57017d9a6e6544e7f8271eb5d447ac7aa99906f52. 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/JPG531801226.
Taipei Super Delicious (feat. KAGAMINE RIN & KAGAMINE LEN)
K-POP! (feat. KAGAMINE RIN & KAGAMINE LEN)
i will tell you all (feat. KAGAMINE RIN & KAGAMINE LEN)
Kimi wa Kuaai (feat. KAGAMINE RIN & KAGAMINE LEN)
The out-of-body in da movie (feat. ZOLA PROJECT)
Yowa no Tsuki -From "Fantaisie Impromptu"- (TV Size) [Instrumental]
"Classicaloid" Original Motion Picture Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc03fc606297b9a19bd98532aae1ec65314b410bbdce93c48e2d2bd445e6332e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPG531700946.