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 0x598ef038eeb3a5fc0f4845929942a6a1aee6b5d0a4e9758005170dc51ed488f1. 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/5bbad1da-9e82-48cb-8726-bc3347bd6ad4.json and https://artists.proofprofile.net/proofs/artist/5bbad1da-9e82-48cb-8726-bc3347bd6ad4.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 0x987f3a609285da9fb65d9195b1701961d367f78b60da10b397776d181003e0ac. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCAEB1951051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ee8175b86fe100a6e411e3fe37495cd89c142ae0a95ef53efd9ca050dfef56. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:48Z), 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/AULBY1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22b9d8408e36ee49752b6b8ad548d20bfe9751f907302f83b0da96ac3e7baaf. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:21Z), 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/AULBY2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc986e99e77166f8569f51d2f7e4c07a90e1ccf62c60c2563e0d1fa3b1f97c9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:48:48Z), 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/FRX872207782.