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 0x85a8f2abaa3fe1b9ebb4d02569bfef422d13d937858f314d5ad75dc32837eb2d. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79e8ea94-6cf5-4671-a5d8-adc37d52e637.json and https://artists.proofprofile.net/proofs/artist/79e8ea94-6cf5-4671-a5d8-adc37d52e637.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 0xd0d5693628d5b43facf652f0d4fdb8ce57e692c360ccd132982387fd6394af1a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:51:27Z), 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/TCAEK1948996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6050454899ab9099fe5d5ccb3b344cbd5b57c10a031d170e7c60a7b60a2943. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:20Z), 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/TCAFA2075187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f0e432d02eb8514aaf971471ee2c143161e578c5a94656b999765185163f75. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGN2249695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae238d768deb3aaf68538a1af9a6652af9e8e219c80f70d91c16f7b4bb64673. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGN2249753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b03f849a8e39c7b535b1728650eaf8c81ddcb55c5ca9bcb6d8cb6db5b93590. 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/TCAGN2249923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1c56f9145b9ae64e03dfec99612f5982232d83e1337d9a460c8c62cb3ea452. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAGX2386942.