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 0x49b44e6d08b14692519c0bbfcd7c58c2d96440e09c448a02eb71e31d3848089e. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6927df7-1834-4646-a30d-37fe470bbf55.json and https://artists.proofprofile.net/proofs/artist/a6927df7-1834-4646-a30d-37fe470bbf55.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90d180a738e4802b739555e9827c4a5ead448a53d7aca8f0169934b29413204. 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/JPG102000993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc81f616ef89ab3d1d919a70a8c9906bc9a2f6d8c43d639928d82b572c42fe32. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:15:23Z), 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/JPG102000994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f1eaf68fc2a1b085a54498de58d0fa5175f9afe70075f517561658e50d1fe8. 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/JPG102000995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2979babec50b90f51739cad3e40ea5893b3e6dd65880c9c28f02469a0bcb47d2. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:41Z), 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/JPG102000998.
グーテフォルクの声飛行～ Hello tiny people ! I will catch you ～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef73ef8054b938ff2f769d05f2d32bbfd85deef308485900d2ef78da8b8c48. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/JPG102101057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dabc8f278f898687d4feb1d9b5c60bfc2f3e605eef253b4365abebdaf635207. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPG102100724.