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 0x21f9c6273c28d40df66106ee07ca7bab4140669267c10bd72868bc643a08fc4b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99f323fa-a3d3-49e2-ba23-367c571e3e54.json and https://artists.proofprofile.net/proofs/artist/99f323fa-a3d3-49e2-ba23-367c571e3e54.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 0xe74a4ad92d2bd6aa84785fee281795687842fc6961faf6dc23db2dfce1f8e8d6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:19:04Z), 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/QZHN42597637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf74b0e719cf81f0e5dd1bdffe8d79e7a9b2333b991ceea12d8760eff8b6182a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:39Z), 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/QZHN42597639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930224ab2615afcdae51c276ba7574ea1d15759c20a7d9117b1c9f942a4c33ea. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:07Z), 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/QZHN42597641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54484e6f3935caddfdd6aeb600e8f6932a50cb7f8c068c58a10f8e4fbcb88f7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHN42597643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf2aca4a33f35c541795bcdf4085b522ce1c3afcb66924c4f090ce0ea69315f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:51Z), 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/QZHN42597644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1efc53caf19b8a8d1ad7a6a8e203c098409724cccda6dfa942b8ac729760138. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHN42597645.