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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ba02eb5ae3eac356f5e22f9d7eb5dd924bb2fa786de6aa2c22c8242ab483bf. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9092c982-1f66-4314-bc04-b647cadd64cc.json and https://artists.proofprofile.net/proofs/artist/9092c982-1f66-4314-bc04-b647cadd64cc.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fba6ff9a4c8a47010ebc50e9d59f2fd4fe59884115940e112ee8724274a8d0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US6QR2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e151ce7428b8c7a683dc3d723db2d13c0d393d2c00712118d8b08d710982466. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US6QR2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d89fd98957a00b45d521cac902239f3daca5162678f639be1e84530e61014c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc76ab71a71d27e4c0c7fb5fc983c2ed5fdec91c5246426790f5e7740205611. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US6QR2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf25cc63a979d47bce68de6cb7f5e4eef1fbc41261926b9a46a43f5838e9adf0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US6QR2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc8dfbdb0af72fe879b8b74bb915be7e3ab44875912d55e909b83b17dfa9c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe3e7fd1a9e4f1c4a98d50acdbd7cc067145e25f1416e096d78ddb4750967d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US6QR2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf08e5a38570ce3356b5e76ce506dbcf02a62d97242b6d10175aeee011034180. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US6QR2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e980cf9d120cf1ed222ccf70b81f5c6b005c3e385b22e6a30c12c3187a6054. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fa15e0d123f720d703d3b29a4a011e288cae23adf6a2707222661db0f77411. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f8b577779c4455edfe73578d926c2ee6595d3ecf3dffcfe5cab75fed68b774. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNWW2292338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ed9e6d4818e9bea896e7eecfa802aa0827af2435d5253168b12bdd58c6065f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US6QR2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc206ffb87ff4f6b02af5394567693cc4fd49549bfd7763bdc310c10b2aa239. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US6QR2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4105066826d354589113ffadb424821ec408e5eb5c8a66f6d44f1f257f02320. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US6QR2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed3b9ac2b8c697d629b24a5bd40aec39a1a60ac4d2c7b9fa1858b1f54f5bc33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US6QR2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb78f5dbc9bc77cf6cba12c386028c41ca760077b2d19b000dc81a9a6e80d343. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2a57bb447bbc3bca3af730b32331b0bef25d2cfcf814afa0c05b7981c1ebd7. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US6QR2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a492f6bb36943ffe87c37043262ef75bc8abef2b3efcb0d50e41271d2f2144. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f619c5a224163e1ea32b6669df233706ebdc9656059a180544fd3fc89704bc3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US6QR2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb194dd779494f7aca2a126a6d6bdaa845817076e7992fb1074e012c1261c1f3d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR3HI2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2383ba99b3ff95996a8630f393499b0546c0becc155abf41ce97dcc3b38328df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b26839a640c705fada4d5519a8852b42e9ce9985accc4fe11ac0be3ddfc502. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fba6ff9a4c8a47010ebc50e9d59f2fd4fe59884115940e112ee8724274a8d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ed9e6d4818e9bea896e7eecfa802aa0827af2435d5253168b12bdd58c6065f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb194dd779494f7aca2a126a6d6bdaa845817076e7992fb1074e012c1261c1f3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR3HI2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc206ffb87ff4f6b02af5394567693cc4fd49549bfd7763bdc310c10b2aa239. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4105066826d354589113ffadb424821ec408e5eb5c8a66f6d44f1f257f02320. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9e560493cfcf0aaa2d43c523bd571ecfe9d4607978262e0f3448d4905259a4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f00167f7f6d8452bf16465a7ccd0aedeb6206f87c5db8244fcef674289e018. 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/US6QR2300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13346dcbd97dce5e15970269287445e300c5bbd1781b9b2a3106ea6219c1820b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US6QR2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb78512654fae7f186e9624c9f22cf1915883adf66aa37046e888da281208719. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US6QR2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e03337f66a1fa2d24b2dbd66eb6556dc12c39a8267416a29062976aa24b229. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZ22B1931952.