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 0x6eca366edecaa5b587f865a42bef2e39433f4923051ae0a651ce400523644f9f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cab3f9a-6f4e-4584-bc08-0252df12cea1.json and https://artists.proofprofile.net/proofs/artist/1cab3f9a-6f4e-4584-bc08-0252df12cea1.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 0x038914dfd757fe02dc135493a24240346e31a57ae5e57006e6745cfdb60c8462. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPB600494203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f20ef47392107a84ef3a336b30ce2121621796be45ac491dbaa2e47ea6a395. 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/JPB600731501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6101dc6a3ed06fc6f6dc37d89f10052ec44a2aa6b4d2b52698d859855708f667. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPB600626802.
犬のうた ～ありがとう～ / 僕にできる事のすべて
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fcf801759e1201433a52e601e007ae035c2c6cdb1532a3d0e6edc1b582d561. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:03Z), 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/JPB600915202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fcf801759e1201433a52e601e007ae035c2c6cdb1532a3d0e6edc1b582d561. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPB600915202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3862f306b5effb804ded58548c5664b1a44af8b413284db9c76bcd3d8c816f9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:54:22Z), 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/JPB602154150.