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 0x9a7465ac818ce7180c72d4071a2afba83d0a4f735a0f41652703aaeb940d3da4. 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/eb33628a-891c-42e5-b390-c072f6817040.json and https://artists.proofprofile.net/proofs/artist/eb33628a-891c-42e5-b390-c072f6817040.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 0x801df379aaa6f3094badcbc8b6443b36af02d3251219314595895146b9530888. 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/QZHN81905255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f900b9a3057960f965f655ebce93f7cce050ffe819be096123d6d0790c316c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:05:27Z), 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/QZS7J2203673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c07ce282e9eabc7ea7c1ce47a17c5265617955e97a9f0abe818c8fc8363caf. 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/QZQAY2355240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ec7d1cf4aa4266a48bb6fee5d8f43e274f6f72408d15bec730c806cf43ab9b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZQAY2376920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f276366a2bbf00080a7f35d36c0649703bb73ff3d66f3cd0237f44fabd045. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZQAY2305638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaeb86733396464665704e9205f4457ad2e7085426c8ba97384a60609d482aa8. 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/QZS7J2387068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc599af14648a99993337d8104d2f4ee03153ae9674c1c563c70a224a687f1861. 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/USLZJ2430202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148a3f6a9d59129734c8fda8ce998398c4e8befc8f2b7337dd83d0c854eb180e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBRKQ2454588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d3c69696aef93affc52d424b6e324d59b669d7cd47126224f18be060684d55. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:31Z), 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/US38Y2526285.