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 0xd4f51778e5c3f9c2e1af1220663cd0fc90afa93365e4896978765913e203ba29. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c0b313c-6a30-4ea2-be17-5d7aadfbf98a.json and https://artists.proofprofile.net/proofs/artist/4c0b313c-6a30-4ea2-be17-5d7aadfbf98a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
入船亭扇遊1「寝床」「厳流島」-「朝日名人会」ライヴシリーズ49
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 0x6d0b1186b30d7be98f7ac07892840a0c12ce449ea48706d8ed5353f7165bd82b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPP400801102.
崇徳院 - 〔収録〕平成22年7月22日 池袋演芸場
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c718493a6401deb4cc03a8a420268a656259c00fbcf32b6f685f591b6df28a8. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/JPCO01022550.
入船亭扇遊2「厩火事」「たちきり」-「朝日名人会」ライヴシリーズ67
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde07103f2ba44691989ec531506a33548f4cd81d700047b699d71b1fd295ee0. 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/JPP401101581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d19679effc758808d59fb276604ae6babfb5efa838f5bed6fed2275b8690c1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPP401101582.
入船亭扇遊3「片棒」「妾馬」-「朝日名人会」ライヴシリーズ80
入船亭扇遊4「三井の大黒」「人形買い」-「朝日名人会」ライヴシリーズ111