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 0x8630cef5eafc9477422eb2f961ab1486df4cbb83bc6aba25767ce393793a9f3b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c526c98-28d1-4a7d-a70b-d1a3f46c78e8.json and https://artists.proofprofile.net/proofs/artist/9c526c98-28d1-4a7d-a70b-d1a3f46c78e8.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 0x38c8e06aea2e5edabd1455fa8aaae4c204a9d32aa237a49fd947f022cbae7f79. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:00Z), 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/NZPB12400962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfcbd6ef3d071eb721afa9a2d1666b80031af9d0dbc3e820d28815d24056739. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:08:35Z), 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/NZPB12302199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d55882d92be186ac74a14fe3867c2da435dfeaa09e379d8d44d12233df5a7f6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NZPB12303906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856222f2c4ac9f7d4bb80fb795f34590e5cd90b0ee5f1a831f432f7777570fad. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:09Z), 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/NZPB12400216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62795cba948ce5e4db40b980fc060ff31a0744264d1969bb0c7143a5a427b61. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NZPB12403736.