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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd776bb33fad1a58f91e72599e604bedeadf7c321dc8e85242c78ee21ca6bc24a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cb230f5-2290-45a0-9695-ebdc5d7e9de7.json and https://artists.proofprofile.net/proofs/artist/8cb230f5-2290-45a0-9695-ebdc5d7e9de7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tokyo Futago Athletic Original sound track
和風 Vol.1 -Instrumental BGM- by Audiostock
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadb51f590dc2bcdc11edc354dbecfab5c3be9ef09df28fc2db4db39f33c5da7. 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/JPW792001292.
和風のリラックスBGM -箏や尺八、篠笛などの日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1acf6e17cb6d1069dd64f5ce694e8a9892a87659061b1fbec1c0b864c586e4cf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/JPW792001320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1da55f82903112c09fb0e2bdf19e2e00688b25aa17822c2d64f9b9ef26a9b2. 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/JPW792001681.
モーツァルト: 歌劇「フィガロの結婚」より「序曲」
朝のクラシック -爽やかな目覚めのためのクラシック名曲選-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413fffa1bfc15c49880eae9320426f766a694cd5b072e69337d2df7503b21cf9. 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/JPW792139690.
ボロディン: 歌劇「イーゴリ公」より「韃靼人の踊り」 (抜粋)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efed0a0ccbedf2e5de6626e64d2f1c514e29b39fda16b4be2669873ecda74d9. 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/JPW792139691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc78862fc3f69a6f24f45bde433e194f276458a7822821b594a358741d070f3c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/JPW792006708.
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
仕事がはかどるモチベーションアップBGM -集中できるインストゥルメンタルBGM-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898315372d0d493dec6e8aabc672a60e3910692b5fe4290f32f90611e14ad23a. 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/JPW792001288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b18132302688d8588d390abb479534d12bdb4af9f68e14d6c7f218459678c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/JPW792000460.