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 0xad5dc624d19f4a97bf006358a87f0fd3cf533f7f196b1c497745a6e1904dfe5a. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5a1d81a-ad6c-4a5c-b828-55b051d05348.json and https://artists.proofprofile.net/proofs/artist/f5a1d81a-ad6c-4a5c-b828-55b051d05348.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 0xea00715922856f68571ec1d8ac0c43d77897f4c2630145489316a34d3becc23a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:41:36Z), 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/TCAGL2248432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb336d2ba8d4d5686c5be1e01356a91b14ba06bfda741cee7b6c283b4dda2f074. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCAHR2331471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3922575cb324b77de90e906d39312352dfb205380027be694bec46a7617a7833. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHZ2459452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa170e7863a4c03baa2ef90c9cb01fe7c4654834e141fe2a866e204921ae592c5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:09:12Z), 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/TCAHZ2459418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad80812b4e1f647b33781a67c53c0e634bd5c42771a4374ef8cd432bcb50d59. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:01Z), 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/TCAIN2464255.