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 0x38613484e5881d1ab5efdf2a017b0b6cdd3adbce2ee5d9310a1a992a4031f3f8. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4fe45599-8939-4118-a3b8-6b8afe9cdb03.json and https://artists.proofprofile.net/proofs/artist/4fe45599-8939-4118-a3b8-6b8afe9cdb03.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 0x93d55c279c6515d6fb9380e4e5b75f184d64dd264427530b2221992edb6c1d03. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUBM01900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01274ee5ec755441966474c3a10d6afd81ddfb786492fb91c03906ff0f04190. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/AUBM01900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc830d088defbe0690702d5139397aa7af512dd3f20baee5edc94f3baf224d. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/AUBM01900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbf36f60fcfe196151800286ff54cbba1417fe5f84f0c62f06cfc531d2d877d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/AUBM01900212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13035e51ccb82ebc28f4118d8f0099ac55e11c205bd9c276f9855de7ba4fb866. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/AUBM01900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a388c7548ad8f80d918b8457b505d4004dc7f45f18e637778cca2b7a3380918. 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/AUBM01900217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f1669cd3ecea958f58b98a59aa32f50589a26ccc73fa17ed5e79f883461340. 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/AUBM01700198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bd244deb90c9dc747bf99bb85346c44bc4cecf5a9e0b0baaab262a93ec90fb. 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/AUBM01700199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3016c67e8026afb002e76418bd39d7fac2821ad904c08b0537a948825f7c5a8e. 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/AUBM01700200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b33dca9d94137b9d26773058f7acf953394b3f0b3f60a90f68f9f01c270300. 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/AUBM01700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7072806a1073cbda58c938d1f5e632d1d4b1993879e9d72312bf1352f8d45cc2. 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/DECY51414061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55586ef163c50d48d7fa9d0d2c61417eed0d9f4698cbed30fd54df8d51f7ebb5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DECY51414062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898795c219e5af90d6971cbceb994bc5a707e97da157719e527b1db881d5bbdb. 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/DECY51414063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91391896ff899e78a11b20cef42f6c7cb1b34c7e917a6c825af47647d13ee11. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DECY51414064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65262f6bc8052884687650affc2e405dcc031c64b170744f54af2bea1d9a8ac7. 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/DECY51414065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5347ba88d5bf1a6fdd953e14bea78b249a29621cf9cdae6d11fbd815a978a2. 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/DECY51414066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17832e7495f7e956fe550f68b506dd5543304330c1ce894e9376ab85c84e59b2. 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/DECY51414067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fceca1f1879d319965ce37d8b161dc23fc2665b707ccdb69b6918b0fce18e7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DECY51414068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd01c2fa4df26981829afa5fb144502156619c7ab0387fdb01338950cccfd5b. 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/DECY51414069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e93868ce4733dc9afd1e9f2ac2c7088e48d6daf791df740e82279f1c4f78ee5. 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/DECY51414060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc16b3f9efc2f1aa45e651e22afb2418a1e1febf82fd78ffe546fe540d175086. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA2B2057466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd657d9877e90e7190be296af49039755e35b9bce9fd01862d49af339f008bc8. 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/USA2B2057463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fc830d088defbe0690702d5139397aa7af512dd3f20baee5edc94f3baf224d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/AUBM01900211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01274ee5ec755441966474c3a10d6afd81ddfb786492fb91c03906ff0f04190. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/AUBM01900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875651f90a58218909c6539155f4ddab6fa0999d90512f06de0b4bb7ccede937. 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/USA2B1704835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fc8a81d32a5443f261b8fbcec68373b9fd3a2c3a74ce187c520ca20a4c2326. 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/AUBM01600433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeac0851377abccbaae13c2c4fa9330a5d8ace786a963784a9658216ac545ec. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DECY51414273.