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 0x6f5385363c87f25ab3e814dfd1dab054be76d152f2b9615ec729dcaa04c4d7ad. 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/4eda52b7-73ca-494a-be7b-27b0e1a00499.json and https://artists.proofprofile.net/proofs/artist/4eda52b7-73ca-494a-be7b-27b0e1a00499.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 0x3ec8602438bc930ceff4c835f38eb3a28d0ec71bc433f52959a78d5d5f284918. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/SEYX60900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b97f3a2ccfc32c68702f75f9135fe0a4d8bdd7eb9ead969503fca256d6242e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:12Z), 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/SEYX60900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1afbae177d56515a779c0300ca4a572f32c4037528dacf1c4285d61a301087. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SEYX60900106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30563c97b84daa341b8ef61ab1c1b7c369ab7e817741ae42133e6fe27ad348ee. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:09:22Z), 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/SEYX60900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900b5f543636b009333f986b9e5641098eb88177f456452ce7b4291e16dae482. 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/SEYX60900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55507a37ac11cd59ea3d9ddf706bfee5f6cd6e0e6a137e461f0f38bbb527460e. 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/SEYOK1013756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1bd693c74df18846ecd7bd48c759029a921faedb6cd0ffd6fa94f5ddbf7582. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/SEYX61100104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43a92afcf58f76ca6504250b337edafaa404ff83d26b2600634dfac55113849. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE3K61200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e70f2c2d3949a1562364405170f0e8b9d9dca8c02a167977ecd33f90a87e53. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/SE3K61200105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7242bdfc46479ac84a0c7b54537231ce67eb8bed10fc47077cecf3cecdad535. 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/SE3K61200107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510170b5f22df8d17147d997012d1e855817f40833b02dab4a5c4dc36abe6777. 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/SE3K61200110.