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 0xfc7052d239e738c44fc99ce61e1b4569176f77c4c43ec478f71fe1dcc0175aec. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c20b4a3e-8828-48b2-a276-35048f62d146.json and https://artists.proofprofile.net/proofs/artist/c20b4a3e-8828-48b2-a276-35048f62d146.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 0xe708810c1cb875e40e6e59104cda90fbc3657e1515e1018a18010dd4232a4f8e. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/TCACU1679096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca640c186b2ce6cc36f937050f3b825ffa5df0c5eefcea7a3c36a10720ae2de. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCACU1679098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ca448d48765d1df2a016d8a183e7d534104928d68c5bd65410be9d23ce0fb4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRPA91700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd50e964301a0029e87a7aa806d1a929f86a9b7041833480e703614d9098be56. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRPZ92113870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0806328515cde7ff440033295436d4b75646f08275d0435f861e10e550be96d9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRPZ92113860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49981b9e4da1abd4a35aa354ce4d1343ca10543b5a5d1a06e611eee6ce3a164. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRPZ92228790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea39c5b917335780268707d0fe1501e17bd1a10efbc403fc7c2189a6489ee4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRPZ92228890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea39c5b917335780268707d0fe1501e17bd1a10efbc403fc7c2189a6489ee4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRPZ92228890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9af22298eeb072bf5c0f8100828e9676be7049d78252bffc85d5d1f2a3836. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:03Z), 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/FRPZ92423890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d0785fabf22cae16086ef01fb4a2911c61451db347e344f6d267636075f439. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRPZ92423900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be0248ecc42e0e1fb939ac3b7c8e1e481076a50aacba7e57527771f737899cf. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/FRPZ92423940.