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 0xeeec21bbf3f867aa45a633b154b4a3aee50ca42b103acbf8c2efe1781dd2d9aa. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/117e9063-2c1f-41b9-90d1-3563be435ec7.json and https://artists.proofprofile.net/proofs/artist/117e9063-2c1f-41b9-90d1-3563be435ec7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ベルガマスク組曲～第1曲 前奏曲（ドビュッシー）
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 0x0477eb2626f8232bf40d5d0c2a1c6378ba2a2e078696bd95704ab87bc555864b. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPVI01617240.
ベルガマスク組曲～第2曲 メヌエット（ドビュッシー）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b7289e6d8df87ce3c84931ef19fb67bcad0999f26bf1fc485c394c8abfaaab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPVI01617250.
ベルガマスク組曲～第3曲 月の光（ドビュッシー）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e5a4312cdd77847f0c1f70eece20ba5dacb2f71e17431cfa43caa73bcd9b41. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPVI01617260.
ベルガマスク組曲～第4曲 パスピエ（ドビュッシー）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7928bd15d2a8b22f0b4fd1b220e2a7626bf7dcb71ee74363da1cb198b80374. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPVI01617270.
プレリュード 嬰ハ短調 「鐘」 Op.3-2 (ラフマニノフ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567dc77a6e25b276e15d3956845ac125bc6e6671e9242fd3f49d28112041f64e. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/JPVI01617360.