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 0x480131766deef124e5da8b92255033f61e7011509f2506e0135875226c45ce04. 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/a68a7c44-7b13-4cdc-ac1c-e6c331007ff7.json and https://artists.proofprofile.net/proofs/artist/a68a7c44-7b13-4cdc-ac1c-e6c331007ff7.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 0x125d81397024332f0ce4e9bbb85618edef2c7198d750cf4c725804869dc6e128. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/JPTO08910010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5721f2d26a4065da799adec07b7d1d31c2a71a7ba5810b3d8739c49920efee25. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPTO08910020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfd07d3e0463ecaf4b45a59ad6197b5342066d9390644c94f5caad5d9f626ee. 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/JPTO08910040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d05b46589b6e551c8debbfc0beff3ad8b2dd1e060b867e17c7004a22f7e5e0. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/JPTO08920410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7a126c9c311bbf90e3a03214840de6313fb4401f0fbb7ee79f8442319f25c3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPTO09013570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159befe1b1a893aae225dcddcb49b2b1f9f6e34b9a3db6d919f83686981debd7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPTO09013580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1c5aca4712af31849e89de7ab06821624b4315a04daf766e7195df768f6610. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPTO09013590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9faaab37da99209c5dbfeb630a4d963b84c8ca11c938cd88cd3ed071cbecd3e. 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/JPTO09013600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5521d535a7157ab6af9cd5c9e1778ed89a0a27f110b01db62c846da9bb10982e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPTO09247330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb833818f0eb2f2f515109e72969030a7491669575b4958c7ea052db4f81b9bb0. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPTO09338870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2224680cc41d87ef9e76898862bf925eca4cb9eee2bda58be612ae1eb326d15c. 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/JPTO09249300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd401e169145e7dc265a5094facada3b3c21aa87ad42ebb1c90c2b93ed4780920. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPKT00300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439f539d1ef484c4d9c4a5b91a3ef83d8e3df5e187c1aecabb9aab4b5bc98c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPL100700608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fc9fbc4e4109a0c2f4ce0f2eda54c5b680f5eaa8e7b76484fa461b76a19bd7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPL100700609.
明日はどっちだ!!!(アルバム・バージョン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5de89806bdc2e2fdb9bc2b314f2ea2adbf2d70fe7dbc3ec1bf82ef1068ae98. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/JPL100700642.