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 0x3da5632a19f70123274bc649f6573c19e7472d5842f293fd42baf50c0bd87409. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff3a3a6e-6c52-4b03-8aef-2c5b4598afd6.json and https://artists.proofprofile.net/proofs/artist/ff3a3a6e-6c52-4b03-8aef-2c5b4598afd6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xe6f49594b42f97b7c34b675a85c24639c59264d264042595a13840a10e8dfb44. 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/TCAGT2306070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6292ff88ecbb24de530620da784031c5dec6a595486643b6eed01405a4f3ba87. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:20:28Z), 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/TCAHI2327318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bfa7439eba7a4439cb694a71932e362a8ff26aee349919bac3a9124c72c8242. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:40:34Z), 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/TCAHK2380724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34afbab6c85c5a6bde6dec3d1bde8a2b798ae3003010d33bc88cc25b3f09c0c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:31:43Z), 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/TCAIT2490455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526f8ae0843353f41e77d6800c3fa641cf01ec0357ecba2ce958d4bbbeed00ee. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJL2583032.