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 0xe416cc72ac824c9c38b43ebfbccc58ef36f4de90777081eb62384cb6e3d9d0a1. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d5731af-2ccd-4927-b465-9c2ebab80cf0.json and https://artists.proofprofile.net/proofs/artist/6d5731af-2ccd-4927-b465-9c2ebab80cf0.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 0x35e5c3e4b314844ed331b87ba3d3116b137e2fa76069eb10e7e14d649d7905c3. 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/GBKPL1562850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2330bc4ed4e1482bddde08ad0d55da16df7704f4410d5840fb10a3bd7014aeb. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:54:55Z), 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/GBKPL1663877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633af21dfc7d026235cd15f8043fb4b7a27d4fdcb517bc5f0fc6349df0d73db8. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/GBAYE1600626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5684370e0d209ef3389bb71cbf065e4bbebfad2170021e9a8cef74999f3d5f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:54Z), 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/GBAYE1600627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b61fc44fb24037c115435185af540963bcc3898f8c5d1418f356e63adca01d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:44:07Z), 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/GBAYE1601843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31101f40c5767dc610b6b64754896523f5b3757a8a7737ce8c7087dcffacc43. 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/UKSFR1900001.