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 0x6de2103bfc070869af4e85158e29d88116b8093d8f5b21495c7b77c36f9cb82a. 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/0a74c50c-7ce1-471a-9c98-12e3b367108a.json and https://artists.proofprofile.net/proofs/artist/0a74c50c-7ce1-471a-9c98-12e3b367108a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
THE IDOLM@STER SideM ST@RTING LINE-10 Café Parade
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 0xfab84a4585763446fa7ce28cb960bb777f63de31e2e21948bc302129a12b7f41. 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/JPI101600459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a426f500fc8bcc7098456f58b2f002620ba1c0526e2fddd110fd2e724d3b4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPI101703024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2355419ece61abb18f920c4012d89729e7240fe3d06f71633c50b4be7bb438d1. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/JPI101703026.
THE IDOLM@STER SideM NEW STAGE EPISODE：04 Café Parade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328b3abd5f8c2da72857c332b460f531811c8de3dd97d4c1ff7a169739a1bd2c. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPI102001581.
THE IDOLM@STER SideM NEW STAGE EPISODE: 04 Café Parade
THE IDOLM@STER SideM GROWING SIGN@L 04 Café Parade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e49bfed1756968c66cba5bdbc406054eba7a274641be8717cbeeff1e63fa6e4. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPI102103313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998d688bfbc4967d91062e5834e51e49157a80cd2424f5d0545377004dbb32d5. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPI102103315.
THE IDOLM@STER SideM 49 ELEMENTS -08 Café Parade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410da95bb5b26d7c3b01a70942035b14590c171f28ba580ee0f708affb8a9b7b. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/JPI102202996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910fdfef2561465a2e1d1092ae9b3c277d98665d33f78686919986baa40ff5bc. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPI102202997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4bd1b11102de5c3a47814fd9f75ed9ac9cadf789439b2b19016d812aaabd7a. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/JPI102202998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028f1cf6f2f4ae65c7b86eab0e96caab7c68bdda382a5f5defdcd5b7d024847b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/JPI102203000.
THE IDOLM@STER SideM CIRCLE OF DELIGHT 03 Café Parade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422fcfbdf29f4d4b906fafaa1047ee3ef541ddf5d9e96d6acb14dbb5388c8d47. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/JPI102302781.
THE IDOLM@STER SideM 10th ANNIVERSARY P@SSION 10 Café Parade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c929ed755f8683a95a9a275056bc4adaea235bb7020edb9afe26644ca399c9. 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/JPI101600461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a426f500fc8bcc7098456f58b2f002620ba1c0526e2fddd110fd2e724d3b4. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPI101703024.
Present For You!!!!! ～A day in the café～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6d65b25135bff1b730a663f29f95e373ba7be8a726d4255c4f0b4c0515fdc7. 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/JPI102000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5debcc71e85a01b72e31fe57dc463b10e890daa181115383ddae0947ec171a00. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPI102001580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e49bfed1756968c66cba5bdbc406054eba7a274641be8717cbeeff1e63fa6e4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPI102103313.