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 0x66bc5946891a5ca3b92b010a49149d3ec7fc039769b26fbf032fcd9535f3f603. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6b7f838-cbc8-4f7b-af58-9158dae87919.json and https://artists.proofprofile.net/proofs/artist/b6b7f838-cbc8-4f7b-af58-9158dae87919.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ふるさと 〜鶫真衣 童謡・唱歌をうたう with オーケストラアンサンブル金沢
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 0x71887e375dd380b57ae96c6b25099daf173c1c6d448da728eda78a3a9bb36d12. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:24Z), 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/JPCO02137670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9ad2390ef0f7a77d8168c839a5fda39686dbcc481f2f4ff011117044089982. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPCO02137660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8090f9a7f9de5ad27569d4112ae5366b9491f73398e98197a75af19555ffedb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPCO02137790.
Furusato: Mai Tsugumi Sings Japanese Standard Songs with Orchestra Ensemble Kanazawa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4b38dbcbe5ab06f510d217c523d25a12b7df992e81e431c5bd34ad136152fe. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPCO02336650.