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 0x9f210ee9cf1e5419ea7c96eda7b475844e7ecc426cbdb675d36bdcf5107e304b. 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/6b6cef17-40d9-436f-8cf2-548b5152213a.json and https://artists.proofprofile.net/proofs/artist/6b6cef17-40d9-436f-8cf2-548b5152213a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
アラサーディスコ (feat. TOPHAMHAT-KYO, ｙｔｒ & 司芭扶)
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 0x74c53692319241ec22e65945ac153ed47292070f78d2984eb323ac2c15920d5a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCJPZ2467195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291189fa1bf70ea975787de6f57f91894f143499f00eb57c5e1c5274bea36075. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCJPZ2467206.
酔いどれマイクリレー (feat. 雨天決行| 抹| らっぷびと| ｙｔｒ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4acbbd3ad2503d3f6b401c5567b120ea49b27f3e587cc0556d474a770501cb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW562103224.
酔いどれマイクリレー (feat. 雨天決行, 抹, らっぷびと, ｙｔｒ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1be77dbc55f09b280d2e61e639b4fbf02c6ccd1b4eb0f9446a38b8b2f05acc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW562106110.
Batti Koi Riddim (feat. 抹, 雨天決行, 司芭扶, Ginryu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a12a25fc097fe7819c63ecb10d7ed555b9c52c63d36b7c413bce034944dbb. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPW561802362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f282fac46d040f8c01c2019fa596c76d601b0978e48ed70eea2e3dc7490456. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/JPW561906554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dc6ccd1f53b221fb37311ac45741886191b800f35cd213a25b4b6ea2aa7ab8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPW561802378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5cc8572150817fe8ea34ea5b9569925d42b0edb8f6f1a74fbfda128e69ac16. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPW562000829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303dc0209cca73a9b0c5f60c6832e0210310f886aeed59302ef172f5bc5553d9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPW562107367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddd7516b00b02d1ef61247bb038f92350c03c0a2efa7dd7f31a2823265daa1b. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPW562107370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0a8583c33e9030416b15ce07ded8800784a001c694fdde82f0e96696ff089f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPW561900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b4121d0a31db3c22202189948cb4e149f226ee1d3b2e5ec6f3da58ac83bc89. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPW561900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526363c7f4c92d8bc308cd02d69e14fe7f91cb57bf81c2e02cf99c77b66d6ebd. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/JPW561802397.
ちぇんりあくしょん (feat. 抹, AO, らっぷびと, Romonosov?, 雨天決行, 司芭扶, 妖狐, ｙｔｒ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84a8c97e56dc5ca709e7796939ca0eaa9d7362597fc3ed635ce3f8eb691c807. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561802308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a373c93b76fd18f93bb781b4bcd44feb888e95fb2e9d1019d77e848fc5488a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPW561900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb561b22a91192f546cd48494a9532689d7d73f65d9c7cedafc16b6f1dc808f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPW561802287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8011fa983d5dce9bd3bb124e404783c8c1298ff2c2fe871f21e8c1ed5bf49bcb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPW561802052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5369aec0fb020026a6d4f56a68aeb55c66c4b89f7717a96f037f587e9bdb92f2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPW561802054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2984f4d136b6b5aae02f1df6d7a502aaca3b42715280571c38de6a81d3a0787. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPW561802060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee45deb921ab571d9b2508abd85bf83762e99a20ed098da88dede70b0c311e4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPW561802091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7664c7c94b84085897e516a62fced76f6bedd7cb988ffdce3643b6a1d7fba191. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPW561802093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47760a80c07e38911ee6866f29b065c3b43b507d24ac39090b722f128877a8c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPZ921910294.