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 0x275182820b60e9c91c040a72b7394ca1a9b1bf863d3c2c01a8a76bf388d7ab17. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d4f8534-d5bc-4ae5-b59f-a902e2572121.json and https://artists.proofprofile.net/proofs/artist/0d4f8534-d5bc-4ae5-b59f-a902e2572121.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 0x98fd6359568cd7cc80dfc10e74371b9b6154034346c312609bf00733bb56a35b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USA2B2211938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d8eea6bcef1ee0f73aa3f34a186e34138fd679cad91e125d27ca8712c54361. 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/USA2B2211940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a074979d35e9eac97515da475ceb3730a69adbe87d1c1e114b0dc5ee5b7d0f2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USA2B2211943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3feb616967b23e8d0ba06847f17d424fe26befc6939fe52cc5df4602bf9aa0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USA2B2211947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1e0c5a797a7c473c642201cc5527f996851e9f3e19ac77141d9f7a4fba8af. 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/USA2B2211952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232f854790d44cdec837e898ed079a0621fcfe96c5cee58f550a4150cee8466b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USA2B2211958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e03da1c19adf29b2e6a1da7f434ec1ae61723eb2e88dd3cbc9abed3005d69d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USA2B2211965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7ce58202b9d4bbd20f38e7694cce5b2605f8daac5ef9ff9abe9020bde44c20. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USA2B2211973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f15ee9cd5be2e8d8d5944c38c73ad41345cd1e6de4c1119b0f459ca975909e9. 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/USA2B2211982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ecb407ff0af0940f0fca007c121008384357f0b38ce4012470fee4834cddad. 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/USA2B2211992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d68816ee28ca298970eddce0961381f1ebe93469c8c5ce9bb8885f625229d71. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA61369545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8638e25d74ae679aaced47c514ad63e0a27c7b546305d245116982db25bb589. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMDA61369546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162585bf3f34f65c940a52c1d6c96bebf05a07717e64e9e6820140c2bed8c3ca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMDA61369547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58b6ee1e706b0a83f36a2251d7436fd332d4bca19879dea747f64d4e16b343e. 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/QMDA61369548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe91a063aae7960e2d1b5995480cb2677690849339fa6e9978709d5dba60a2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QMDA61369549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52c4a91b14748b976470cd8f230d2a6542c0f21b031fae1de5da7a15f19330c. 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/QMDA61369550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca31ab655104bd2a3e86e86cebd78202f00a7093697a96b6b7469e373bbfb506. 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/QMDA61369551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e957d3f279702ba4470a4e6dd399516f6eb214fb0493067f1f2fd7c94a46226. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QMDA61369552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a42e688b9aa6c570ec7d5dd6a6ed32505def3b28e4c477c9fced4aa475074e. 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/QMDA61369553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8119757e4954650aaa8a97539ae7bb02e4ff2fa81d8716af8a8a9e3d677e377. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/QMDA61369554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd044edf002f041e7a397f5664c4d93e69c5b2b796b35c23468eae95e804de8f7. 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/QM4TX1873059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41ba707dd021c6558e83700e6ba19ffe4b7113967afaf49620bd2c35b1cb0c9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/QM4TX1873060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e903ab80bfb234cf301798083a413944ed1e4803cdb76806cd2de0959c1c34d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM4TX1873061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27056eb00fe8d2b029d9e686908b3756570087d289756f81dfc27fb12a252eb. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM4TX1873062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c4472fbf2730d3dd87356225c664434bfa054f1e755a8a606af0180996d82b. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM4TX1873063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab37fd7e8cffd308df8e2dd6d1746f7489bca7fb9133fdcc923f82858d2e45c. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TX1873065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc060052181e3ed7499fe46351aa193f2c304ab50959d17c4a371adf0e53bda89. 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/USA2B2103647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b60038c79e84a8001102d92630ac06840ad93dcba097af55a46d2455261d900. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/USA2B2103648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d89b0222a99563e6f87bc0fbf80695fc168cdba49de8e3b42c7a9e0e95abfae. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA2B2103649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9887b5f9fd35ac07613fda62d5561602907a03a7ecc249654e155feeb10258. 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/USA2B2103650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aa6637ebebf74b711137a2b6ee531c97466a6c0f3d5fb6338a2d5cbc67bd6e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA2B2103651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5bd8d0e1bb098277f3cb119436c04ac86ef978cc1b50e65cde549fd54f5837. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA2B2103653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8be581ad6ef876eaeee3aa9a699ce1d2b5503c24700f05b82f76ca0e235b849. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/US2B22351701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a352d733a51ffd80a26705b93160748efc18215cf310052d32010afad78515c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM6MZ1491852.