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 0x684b786f970cda4e82aec2b1c36af7dc9cd4b6e0be3c27ce5885c298ba664f31. 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/bb1e0686-454f-41ac-a158-b20a155d2209.json and https://artists.proofprofile.net/proofs/artist/bb1e0686-454f-41ac-a158-b20a155d2209.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 0x5d48f22917ed9134f94c6aaeb2c21216eafffdb03ec52b85833ddbd6e5646e04. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCJPP2104363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a972a95b33b062355b88e5278315906ab55053c52bfbc58938eca0cfa9e02. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCJPP2104385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c1f9e8deba848ff7dda0170307f58045cbe7d98212a09f621fe502e40d5478. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCJPP2104371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716bbed40c7a00cc87728d0b1b2ab155bb8c711412a93e9a9c376b71315bd06d. 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/TCJPP2104417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fc7ba0eb1e6d13422fb8388120c08c6f4e2d6cb279f59204c68b26987be80e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCJPX2347040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404326186e58e4b0e8a9487c9b930da15a2e7a51564572671618fc9771472f09. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPX2347048.
どうでもいいよ (feat. Big Mike, OSAMI & Hideyoshi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036503ac9af4085697715c7796daaaf989a513c08f33e15f60f7160c243a4e82. 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/TCJPX2347069.
Moon Rock (feat. Hideyoshi, OSAMI & Big Mike)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd546d72da5516529232ce3d35e82b2fe240b39848cea374f77145848c65b5d6a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPX2347081.
寝れない夜に聴く唄 (feat. OSAMI, Hideyoshi & Asiff)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6bb260961a87689f68601dea8ef59dde77beaa532c485bd36e42f5c58ba120. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCJPX2347090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff1000b6371a9c151e9e6abde80e2114815457d66375272eb60e03f4467c2b8. 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/TCJPX2347043.
GIRI GIRI (feat. OSAMI, Hideyoshi, Big Mike & DALU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d9636b2dd80d53d474cad5df46ee759dd0a0bebea7e2a145d4e5b2f57e1a26. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCJPX2347045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd546d72da5516529232ce3d35e82b2fe240b39848cea374f77145848c65b5d6a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCJPX2347081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02288f201c74eda1371d13447719304715d5da7175d8072e972f16139f867ad. 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/TCJPZ2486123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39d024722534bae84b4c8782f93232e540699d81538b2759e14019f6c058e52. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCJPA2460731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a188f6f2861738212846aa720799a650c2e629e8bf092f779ce45afc156081. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCJPD2543715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004ba8d6a21a08b6c301c64a23ab0d29939e02b128dde5017291c5db9311f176. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCJPD2536991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02288f201c74eda1371d13447719304715d5da7175d8072e972f16139f867ad. 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/TCJPZ2486123.
NASHITOGE (feat. DALU, Big Mike & Hideyoshi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fbf0d7d23a6fda238f2c79ad2756553aff2ea0b1cd85019d1ee2804bb3725f. 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/TCJPD2537032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d88bc43207ff4c7fa1baf2b3d371fedfe23c0abee03c4a5287451c6cd62c7e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPD2543706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe74d2ce2a47e9ede414ca1d0f6a8b04d15918d73c193554ee6ab963e1ffe8fc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPB2475901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21b6c7c2fd28c5de438afeb16e2b933a43206617374f938feabeb9d2acc1117. 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/TCJPD2543717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08909ec35cc275de48a7d9264292749a61134c6494acf048986dd30c1d0ab94f. 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/TCJPD2543753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39d024722534bae84b4c8782f93232e540699d81538b2759e14019f6c058e52. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCJPA2460731.