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 0xbc6728fa6dda15d023eb16130e83a683f8cdb6f9056a42111f747e806ed6b443. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4262316-fc24-4cc3-b961-7b49164fecbc.json and https://artists.proofprofile.net/proofs/artist/f4262316-fc24-4cc3-b961-7b49164fecbc.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 0x4ee7af05824503b2f0b7a26d6da531d92b5267886a7d83d670aa2b370fc7f4cb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADX1825344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664112b9e7fe6d804b1d70aedcce2e9aad242b439514e20d0e1e15f12d61f3fd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCADX1825348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d126908952033d51fcfb94e9d67daf83ef8274bbd006982a554aed8428ca37. 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/TCADX1825350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34c8c850bb4812b5f98a0dbddbc4e8d7f9b858d966c4b6c3e66c9034ca4718b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCADX1825401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6eeca75b46e1686c6378fa4901f49ae04f74f914f611ec273f4f25772403f64. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:04Z), 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/TCADX1825404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bf7be794a3f50398ccb0479a6c6d57b6e837551532237fb2314550c3f9ef0a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:58:13Z), 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/TCADX1825406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff5a63330b406ee718263fc31c881d988aa1fd34d726e009e5f335d56c9947. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADX1825408.
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