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 0xeed901baca70e472f53d84f47e097ed60904ebee2b461086a689bfaa271e739c. Chain 2 (Bitcoin): anchored in block 954139 (2026-06-17T21:12:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8015d223-219c-41b2-8c2a-7908e530017b.json and https://artists.proofprofile.net/proofs/artist/8015d223-219c-41b2-8c2a-7908e530017b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ダイヤモンドラスト・ホッカイダ (feat. 初音ミク)
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 0x76e6000cfed6ed013d95df4afb43c53ce689ac6dd09a8b9b77f4d5284dca0ed5. 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/JP92Q2302054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447b031f71298c43880c2c5dbc0ff6e50f39a32c3399fea5787cedc1cb4e8347. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JP92Q2302055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4371be477b12dc527cb1ce086a3d11731505af215536756d01803e6eda215f9. 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/JP92Q2302056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1229b113f2ee4d7410ed34da9293c6ec47e0a57bfd50cd68f90659629efc0e10. 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/JP92Q2302057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818ebbaf733c881a38ec681fc4d6b4186df932fd100e623c75262267ed57995c. 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/JP92Q2302058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a6539e33b8f325ecf8877d52d91e9ad6e92fd2b267435ba9e30592f7959436. 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/JP92Q2302059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dbca7fbcdd62e4af74da269d3d971c129d347e29b0245a0697cc87245d4310. 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/JP92Q2302060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5aafcb4535173091aeb32a9259191cfb6eb15044fbb1058ac6fdd16980bc76. 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/JP92Q2302061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace8ade2ea04995a1adfc092eaf440ef09201e9e1a62b738a91cbb63b13618a7. 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/JP92Q2302062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c1139bed85fc0d0dc2bf7a5850c3eee3b55ef7f2156c0c36d56be397ac6e3f. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/JP92Q2302063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c1e42e67e510e34e54ec666a22525caa2b6242b5e5ccd6cd2948d28fb8a2ff. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JP92Q2302064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e411df90254e584d97e1dd9d81da8d3c78a841684e3c3d127c73ea4064a59da. 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/TCJPA2438871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e72a70fe5a74388e06a110d593988f8bfb163c1c2337a22136fee7b1fff72e. 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/TCJPA2438881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f084c58581f98ce358cf2796ad4c249c54655a03de277c7c3c2056e7802bc7. 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/TCJPA2438945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57d491e79d31549e86d5cac4c39e249df3a8783ef18545bc6607c36f8a266f30. 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/TCJPA2438946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d8d7db776e9f9f26eacff720030209e8576471cbf5277cb895eed59d4b8ec. 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/TCJPA2438948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f0e3d4a329d684ef518ffd49a91070059d0673b5d96977cf2bed2da848a73d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TCJPA2438958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85af02ca928ec6c07bdf0b7b167e9123049568ce950b8d39bfaffe2af1633962. 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/TCJPA2438963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e4a60f67b8b22e0583501191ea7748d065c0073766d598a3b1c85e159cb5a3. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCJPA2432252.