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 0x32702b5d645d1c8575ef35d37bf684250c08fbdbf9c5eb5ddabf27bbd68430f3. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaea11d9-b9eb-4131-a779-44542c60ecb7.json and https://artists.proofprofile.net/proofs/artist/eaea11d9-b9eb-4131-a779-44542c60ecb7.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 0xd1e05309e0a9344d2ce531bb673683265ded7bb73bdcca344008b8576ae2f22a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6SA2173416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259829a4edd2eeaeec53008159781c7ece74eb8b6e6eabadd43aa29bf27f11e3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:57Z), 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/SE6SA2171286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fa8e5b2f188f2bbc1b7be74461698c5486fd48ad2adb6944d7a0be17ba754b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE62M2189981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18718d414388d343cda1cb64b87a06e22ea8a724c80c7987b222b58ca4974802. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:27:00Z), 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/SE5752243395.
Collection of Bosnian Nasheeds, Vol. 1 (A Capella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4450653c6bcbf81c05f4f2005eb580c9c61d3613adc59ae4a7063252cb5baca6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6QE2483397.