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 0xf57d8b1f9c91143d627677c4121a012b1526c5549d44fd9033303dd9b1de3599. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f14da8e-291a-47e7-ad45-0dea68e74aa4.json and https://artists.proofprofile.net/proofs/artist/2f14da8e-291a-47e7-ad45-0dea68e74aa4.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 0xcf10c8da768fd93e9b2253f549fc70e1bdf8693a1a1481195f35bbeb44371ea5. 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/TCACI1586328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9841c1585c90574499575580610b835a4997754ba933a84b8cf971af8ede2716. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCACI1586329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678eca3e465217ffcedfaf6efbddc7ddfe49ff8ae30563de060a8fd851164647. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:33Z), 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/TCACI1586335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3165825f316f6fb7256e9365be2cff32d9f1fb19871f45fc71c1e77d031a25ca. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SEXEN1900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e20b86940196781ca6ee02f79ee2c3e77a0d1a23fbbef3bc0511aaf8ef217a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SEXEN1900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8b080ac4d571c85df425d9d876763acad480df0a8f5b9e7b7cec8468fe0bc1. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/SEXEN1900304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb94282b1da9a71a56478953e8951cf297eae061f53a32baacf4d1d4874c4c16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEXEN1900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfa844bd5f5a9b25a67eec9e4316d0424e986fb7437f186b6737802ada71323. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SEXEN1900308.