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 0x979b1fdccde08a91b6aab6078fcb6c6abeae1ee4438175d44fc5491d5b9c0c16. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c074baa8-944a-4349-95bc-8ac1dd4419f5.json and https://artists.proofprofile.net/proofs/artist/c074baa8-944a-4349-95bc-8ac1dd4419f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
さよなら、あるいは午前4時の水族館で
さよならの裏側で～両想いの片想い～
さよならの裏側で４～両想いの片想い～
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 0x3ae972dc3bfba947e6fd3b9424b7dd3ebe7b8c7ad6ac7d307c5600345a31f96b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/JPW462559982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d080d18d7b7ae612088e55a0061e4f6ca5c586e76a9cc6372d359a6549c21b. 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/JPW462561960.
死ぬほどじゃないけど、生きるのがうまくいかない日
左耳しか聴こえない世界で― 君は右側から、「愛してる」って言った ―
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba1930dc4651fe6d14481a6fe0556aec25e859b974d7d317b6cc8fd1ea739ef. 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/JPW462564839.
The Pianist Who Lives on the Moon ― Even if the sound doesn’t reach you, I’ll keep playing ―
天気予報は、僕を晴れにしなかった
ゼロとゼロを結んだ線の上 ― 僕たちは、何も持たないまま手をつないだ ―
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663b8d8632e744caf7cd8215ac4de7a9c18f6b922b071b05fe0cf524e4f10632. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/GXBAV2093578.