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 0x8ab8099ccb4cf34f9d2a9951b68a983f3d02580b28d9033a5d58defa822eb0d5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d10b7a0b-9e58-44f7-b8fb-cf4e2b07267b.json and https://artists.proofprofile.net/proofs/artist/d10b7a0b-9e58-44f7-b8fb-cf4e2b07267b.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 0x5560f75f33260892511f86dcf6c73a086714ca69feb565dae5cbf058e099ce5a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SKAB81900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7d8b508b26f528f667cac7d85430c91fb89461fbcef1b2ccb11c15948e6b15. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:39:34Z), 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/SKAB81900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa4e51aa56c69eee6d28b9da59a37783032843dde77103bb4df7725d65b8342. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/SKAB81900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911484c2ee281c10e85c56045a1da41efab51a59e1b1dc55fc46c2c24afa1e15. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:58:26Z), 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/SKAB81900108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc02d27f0c536105625d60d2f7fe7c7139913f2d3a7602b2dfa1751e3fda99. 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/SKA832115901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59330a9412a72abbeaf2ed3ddcdb7f86d68393a794fb7594433dd94c275c5016. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SKA832115902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2323129ada5fb99b4d1dbbd60e31fe4b0071487ac5520c0deb4c4249208b62. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:28Z), 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/SKA832115905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6df44838484f06f40bfb4a76a26f2924d0b106c645c65a3dba11ad344ff05c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:32:03Z), 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/SKA832115907.