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 0xbd025605980f5ead122fa2b5eff1d96b3273d2accd519859f0d59fc882f2eef5. 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/ee96f852-9608-42fc-b9af-37a17bcdea1f.json and https://artists.proofprofile.net/proofs/artist/ee96f852-9608-42fc-b9af-37a17bcdea1f.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 0xdcde2c3972d36bda091964a961bf6087dcb689b0d2b4e326e9bd65493622a883. 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/DGA092401857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab608aaf6190b59b093a691c4c1d94b3856915051e90238c6cb866df5295fd5. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/FR59R2110453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02eb44fb9e91381dd09e730ccb149e2872908f4dd249a62bad152fb825042d2a. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:59:07Z), 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/FR59R2113999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdae7d4b99e54b3d45479c8c4e48fd78c63c1c29fbffeb88f71229d809309f8. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FR59R2110451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce0190facb9069a81a7c6e11b14a0f6473dd509ef872a467b47f698003c9efe. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:05:34Z), 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/FRX202128703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7880f916c3f02b06d5d3af5b6c54dc72402c46f570fc3f80c049b669a22c93. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:02Z), 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/FRX282178095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7572cbe27e2b416a223396d3eec77af50ca256920216f2858bb1a9df4cf8735. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR96X2355414.