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 0x682c7e7284fb73af70deabeada455d9dd0fdcc1f4208772192ddb193d3c5e129. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f72a0e88-acb6-499d-873c-1ee23f0bb6ab.json and https://artists.proofprofile.net/proofs/artist/f72a0e88-acb6-499d-873c-1ee23f0bb6ab.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 0x5c7f4654aceff727f5770ee7227365cfe5ad14b273950abb0dcfc4ca65886401. 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/USA2P1621470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc7fcbae4a98aad1a54e4977583906d15e23747fd9bcac55fc10b91ea8678f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ZAJF21800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ed5c1631a31411608a895c4aed304414e1875f35942408513d276e8e4dc47a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ZAJF21800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f384b6bdb7bbbd6bc0dd29bde0d1778bd07b9be5eedfda8e14c580c7e03fb98. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAEP2044075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4d4f5df6fd8574276c85c9bb6eea671603eb68ff31860092d98b31b359e303. 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/TCAHZ2415514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe827d0dc5e2007267d3d9c8ab44338caf36d1a8418b4b17d1d1a42ee008808. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAHZ2415527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ddcd1cbe3dff47d32047add6a8138076cfaebbdce90f430a6f4010bdcc57aa. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:30:34Z), 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/TCAHU2428823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235afb1b2bd2ce94694367c643c1fff9df934291697d56606fb85b08a96ccf3a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGE2283782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf74131c71963e32e0464403d1bfaf373a17b652866bdd9e8669f9c1cafac9bb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:00:00Z), 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/QT65X2525034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f417a0846ad68c55cf64eee7a1e163067f6299dd333311d641433d375b5231c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZK6L2370780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749786c553fd157261c5ecc6010abbc2914d763b98a688769ac453193037c145. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZFYZ2001271.