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 0xe597f6fb464d9af3bb9966904757a07d7ee2e132c9f9d77b884730ef05218e9e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/908f7455-02d7-4ee5-9bd1-5ef8e40dfeea.json and https://artists.proofprofile.net/proofs/artist/908f7455-02d7-4ee5-9bd1-5ef8e40dfeea.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 0xeb2b698c86de7b1c53226009ced2258f6494be28c2890e3be7594014f8ba5e09. 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/QZTBC2393500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13585189c404c0f8f79476462da9f23675c0fe90eb227b5024b1be61740e3ab. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFZ42412816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477774c61fd207b7cd2be3fa5490d11f6deb324a9210b8df7c8d2acc0d267778. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:35:26Z), 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/QZK6F2413398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d0b13675931ae27ad5aa931c566f0cdee46654914c72e872728be8acb517e6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNWW2404503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a945c43bb80565ec7a53c020484ab0bd66490e1dc837f013cdd76ade252413. 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/QZWFE2464088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6b24caaedf6baf9d8c50b508b9c091f17413f0bba209d7a7cad9ea264d6d95. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:23:27Z), 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/QZWFQ2473097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc260e587bf534f6847441b940cb74efd273edc282d6bc97194369e1e5237ce18. 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/QZK6F2554375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af81df9176271f853d26050a03827e10cf11ad6e3a4a1c7c3f2015eb93361a2. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZWFK2514625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c824e17d7052bf16a6e355d67eb30771a050347d4458246092c5aebd86c0f8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZRP52374902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1546eff07e510efe2c9ff5720880b8ea1c025cf0e9b3aac6b391bf5c5982c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES92449680.