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 0xabbf95fbc420d71634b6070f45a27298c4c39a3296d1259ac317be4ad8ceacd8. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20d2178a-d8e2-4b58-b427-640bc4a7c13b.json and https://artists.proofprofile.net/proofs/artist/20d2178a-d8e2-4b58-b427-640bc4a7c13b.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 0x386ff57674c22bda21e49f1be7fab172f6d97784252fbc307a68b274a2d0d94b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPW561804045.
ETERNAL WiNG(10th anniversary REMASTER)(feat.坂上 なち)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01daa00339063da927e5c2adecfadc96aa058e84c415897b405d418d91293712. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/JPW562110769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909e43eced78fca29487fb3a548ac90e9a272a3d0c4649ffc70133776bef9482. 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/JPW562103220.
Wake Up Your Hands(HIGH SPEEDVer.)(sumijun feat. 坂上 なち)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6ed675fb4c71cd3417a5cab5db0948e6fb19d68db05fe7474648151b65239d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPW561907094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ec3399ae202104400235aa65c9ef1a74739f25696fb84c5ada1ec367cabc91. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/JPW562103075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac5f8bb82806e6dcf567423111d3e775c14a7e84f8f25ceb674e800fbd2c320. 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/JPW562004405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb0261c482af81f1a26acd5813c5fa83a0e049bcc8fef14f703665b7d13c9f2. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/JPW562004408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65978ceb10a0cdb277dc3d95f31ade1bf19deef8de43733526afadb4b2dee35f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPW562004423.
Against, Perfect Cherry Blossom. feat. 坂上なち
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4540643170d8d00bd4b23b6a47d7157bd85c7c62c6c10e56e00b4c3ba76bb58e. 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/JPW562004428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cedd18088673e620eee29b934818896240ca59bdf6ec08696c741a8c0fdaaf. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/JPW562004430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbed59f2fbe323646bbe29ae2e7e3c07d6a8ac3a909948978130920adff28117. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPW561804023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95cc15b82ec88306bf69c97f9052987ee6b31d086319fe44a27e29c30d9485aa. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPW561804101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5444db1cf85613e10604d30a4dc799e3c427f63f3624f403f4874e48752337. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/JPW561804041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a546b3f1e99a609fd7a7154d07a16d001e2b1f5f823d637df5fcbf5280ba62d. 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/JPW561804061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9352e9c7f1c5d44afc7fcb11f30dbb53366b191d00b95378f852288457bc55a. 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/JPW562004441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3f185ab3c9e155ff93110616a169c8a5997c7b0f9167c70be78ae6b3cd0c56. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPW561905532.