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 0x67959c1997149c24eed5846dd3504b3919c337a3fff0e63ff0b6568188070735. 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/3ceee4d8-a0f3-42c0-a142-173a4e87e812.json and https://artists.proofprofile.net/proofs/artist/3ceee4d8-a0f3-42c0-a142-173a4e87e812.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 0x3773d22918ea1a32a3494eef041459cd0869e1ee0b664e9ac26795b5cc6ff5c9. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/JPC841600901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca11cf5b841a592bd95e50d89b156201dee4eec1033e706e3c571c2cabe841c. 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/JPC841700901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5e1f4c67bd42802482bd53ab6d7079b75fc120ba443c7fa8d0b663d281f696. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPC841703001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b68c849876e6eaf58cc5b6617cd7372fb71ef86e806bf520229cdfbe6aa4843. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/JPC841800501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb149a81ed61e192af5da0da9eb6b8f447fad79a1f198c0859f4930fc94befc0f. 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/JPC841800502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae903329faa0dca6c9188f23d5f3c5ab4f3409d96f1ee1b365c7085b420e504. 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/JPC841800509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca7571328410f038227d58b57cde71ebd86fa72490f99682df2eba72e071fd5. 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/JPC841800513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74598f7d64974d769015e9df037efa64027748a082de8310545ca4e20244ad04. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/JPC841900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebfec602d5ec9a2566924a87d22726dabe2242acad8d480137eea546c274092. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/JPC841900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405eb3e1153509260c0627c00a015ecef0d8863259915cfb801cab96b8eee0fc. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPB752000107.
化かし愛のうた / 獅子奮迅フルスイング
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ae918f1cc99c0ebc872349700f7877f2e82824887ab01f3b0d309a4a726e34. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/JPCO02113460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8bb2a940a1a56b8987bed23bf7e6bb2f8b6bc751cb6e91cd3c3d7a56fb7e0c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPCO02105560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39021315b4ec96c744b7f81fccb0d016c5116b2e0387d31acd2b9bb0f41df5e3. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/JPR502304437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8ac8a601dcde7ca33d7f0f146c78526e9dd405c810a13c4faf485b5d2a6c22. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPR502304440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a07cbe7df7f9f8b339e815cd224eb50727d82801b2f86d3bf86162d32b211b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPR502304445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69d99d76423a9973e2507dbfc65060f6b96c90bb225c80c4b1429a1940b4d97. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/JPR502304446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf804f781352b0533560bff8184690b7f713d25fcf50fbecd4bea25e0a6edaa. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPR502403965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f52b83c3e061a3803ab8e202365351ea82ab99be1d944b57b2e1c05c3a8e38. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPR502422001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0850244bbf8e70e3e9905a74d4652aa581cad1a8084f3a807ea85bbfaebf20. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPR502509347.