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 0x6fa99320fe0c736448df6967bff7b073cd030adf2f7b09031e90a2562def0af1. 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/709fb50d-39e0-4c89-94bb-ded5721176c0.json and https://artists.proofprofile.net/proofs/artist/709fb50d-39e0-4c89-94bb-ded5721176c0.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 0xc11d9f28568ff002479dcc364e0424479e128aa27538f061d46767a55b6ede27. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:23Z), 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/TCADH1765721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3258d8b354e8f0850b31f57e944123b39f482a55c46c84784fec5be25d65000c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:09:01Z), 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/TCADN1842531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9b35a39c931518c416b237636759338100d539cbeb188aa1e30957cfcb8691. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAEF1914949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31b247213328482e7ea791bd59603bb4c361460f6d96b5884b28f8f81358b5c. 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/TCAEF1914951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc635a2a6847d37e51eee1fe6f3ed09142b03657368ab59bf51733bcfbb52bf43. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:56Z), 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/TCAEF1914959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f64bb054a2ff854f8eedcf29e3b7cb2d3176f61b63ecf5b3adbb6b8fe386aae. 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/TCAEF1914980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af563a123ea05decd3336a0cc62be7ac6fe628f3f6a2a8c802769a1a935b560. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA82067080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ed76b5408da2687da2b03bba75086900e61b5624af612a0ffe591240c947ba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA82067081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f8608ef30a488bdde1a812c0363e599a995c214a243d2cad07eb7f22c70bae. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES52155695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d83b918d31be9dfa5c6d009a5edae98796b4691e998d0ea17beac16a18aac5. 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/TCAFL2185801.