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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d9d932605d6ca986a1c74f1672f20cd26ceb8a681bc5241b6cd23af2295bd4. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/910bdc32-80d7-4966-a804-3ee059d351e5.json and https://artists.proofprofile.net/proofs/artist/910bdc32-80d7-4966-a804-3ee059d351e5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
立川 生志 1「元犬」「だくだく」「茶の湯」-「朝日名人会」ライヴシリーズ48
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3c6ea0bbdebd90302faad2edac2e14572a85ec42d3b573ca391b2edb956e68. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPP400801109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1611a613003291a7ecab84019ab687d2e59c02550729024510ef86111775eaf2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPP400801110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99fc43c827a9d4fd757cade97b8b8e0efadf1ce8034a14b840d8d6deed2c36e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/JPP400801111.
立川 生志2「禁酒番屋」「短命」-「朝日名人会」ライヴシリーズ65
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f22f0eb3265288f02b3daee94b6f98ad61b98d412933e929ef331bd2bfcef9e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:22:12Z), 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/JPP401001502.
立川 生志3「井戸の茶碗」「金明竹」-「朝日名人会」ライヴシリーズ89
立川 生志4「道具屋」「品川心中」-「朝日名人会」ライヴシリーズ117
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2818238891eab6f2f4454402ef52fb7778c42f07800887de368f014683242101. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/JPP401600399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed989a0334c3e6c87edc34e151289bc3c28c913a80a37abf8817cbe51aeb0ae4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/JPP401600400.