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 0xdb30133078c0d6ab1a8be6d1edfb528937d42e4c8907e629d93a351f7640c706. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6491d9c2-76bf-4ec3-b568-763709943904.json and https://artists.proofprofile.net/proofs/artist/6491d9c2-76bf-4ec3-b568-763709943904.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 0x0c971bb941d6356d8e565be8d3c121dddd37e7353d7dcfb7b6c8b681d107811b. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:08:34Z), 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/QM6MZ2483466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368bc55dd52450c053c6848141055297b8252098c29487447685c3f83f37784f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW2427320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5ccdc8600075c671ed519a09bd2995fd84409c1c3aae9dedda852e57f7956b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TX2479470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496424700194bba737e7792cc7acb418cefe9dbbef35e34a878adcbe3d503e75. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QM6MZ2483316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5ab5a9c4cb5dfa731b17294d2bd84aa4737e292ad5bd807a4a1b1bb4172d96. 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/QM4TW2437333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4fb75a5ce078fc207e9ff9dabc845a7bf8b5bed30cf67b6e09c5bde0cc00e7. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/QM6MZ2483353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf620d06320d669130e8f0de69cb7414b92b61b1732be9c678c10298975429d8a. 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/QM6MZ2483337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6182ef5eb4e3cd66ad20023017151cd4858ce24265baa532e0f0a04259f9fa4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:30Z), 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/QZHN72581165.