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 0x079ce86be13711e02f444bf00c2b826527c66cf8278cb882994d5c2e9dffde93. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f28889db-97f4-4adb-ab36-37e99f82f659.json and https://artists.proofprofile.net/proofs/artist/f28889db-97f4-4adb-ab36-37e99f82f659.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 0x41c0ab18153a1a777d3c3e404a9a34f32fb4f996276de9e0805bbd15ba80c6d7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWFK2312900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6010569796ae7ddbc85194630862aa16ddcd031d214e1ff0dc45fd0180495081. 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/QZWFK2312902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbffd662c5b5738438fdf6834ba5bac6cc8750cb51f5906e9c513fbbae4580e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZWFK2312906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64318ee03aded3d9d606ebfd17f2baec7c6110643d9024cf71296aa5f851e66a. 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/QZWFK2312908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ec2d896eb452df08ec9bcc6893df5f8e2214b61c48f682cf10806c05a2a71f. 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/QZWFK2312910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6544208a218b5e43f31dc6292d524904270ab9733eb999a7e468a5d7448db7. 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/QZTPX2493958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbaba900c1df5faaf94f57ecd3b83b7bff2dee678b051274b50332e65a342de. 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/QZTPX2493959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605989197b5e8c18411b6d4a0864f5bb5cc16b109552cbab66d4f0b9de8770b6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZTPX2493960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2947d3afd3487168ad78debd4c1a1ea33828ff6e2d77d7291344fd97df134193. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZTPX2493961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5a09acf65f3a6429846d5ccb7655e22de89a8292b73e3ecc71fdea880e5c7e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTPX2493962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e9a77dbc974966a641c483e7a4970f0d38d45d9ed9dafe1cdd989b6ec1a325. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZTPX2493963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37a891df8c6e1bd5263cef26b3898381314ae734a1650e7f645c97f7170cc3d. 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/QZTPX2493964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f309a9b6c477455997283fc69056e5f862d5b8bc0bbb5929bc2d27f24a27e. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZTPX2493965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e8a34b17ed55ba290965e71142c39f289dbdb26e1ca2875dc568bca1479d8c. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/QZTPX2493966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf960071ca1e7a37fb88bc600f408338942bf0a87f6825cd024b560058a0be1a6. 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/QZTPX2493967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03b7c4616e153f899892494ae6b66835f2e9cd74ae247d010457774ad873458. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZTPX2493968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124bb43d2090a2f54f93b537671decc67be4045f52206a4b512f1e7bd620a368. 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/QZTPX2493969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e4f53a973809239d4572498bea8ebb89220e2be49ef40cd9fcc704889735d5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTPX2493970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2769997f989e5243e90de3f5b16080ed8f888af4da3677bf530d0bd78f6a0c8b. 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/QZNJZ2481868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07e180a4a75a71ac7c34acb59b310c81b715e779cdd89f71807356f2de74830. 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/QZNJZ2481869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6379d441d7e67e24c5980cbef60934e341027236d82a29517799a4b9cc299c15. 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/QZNJZ2481870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0eb72499c469fbc77e44cd98b5ede529820f16254cdec38be4a4318d602b08. 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/QZNJZ2481871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c577da273daf3afae845d2bac83564f0c9486b3f8cdc888486f5a833074fff. 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/QZNJZ2481873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f5587df15ebb22e0fca096bbc66a81ee0389140ebb2ce32c07b5199a12d1d5. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZNJZ2481875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82cca90649d2d0e47b52e1568943cbafb2b5d40328435b4c53173cf7f07abd0. 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/QZNJZ2481876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9275e5cc03cb1bfcd641ef2b96a4a6d4db2a01a229258b79c42c1395c1a69. 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/QZNJZ2481877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5122bf924f49cf820d2d427af53b5d40c210faad1e5a2caabb0faa318cef120. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZNJZ2481878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d3c6e81f12fe5dde54dc1725cef812c8254a278b1acfdbe0b620d0e2929e28. 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/QZMZ92468001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261dc99f8cb501c4a92523e7f23a4d8216c1a001453d35bd91f449537bfc8bf0. 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/QZMZ92468002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbb38b60b3941fa654518500491ce264bd4e3c8087030bf25705512f38c997d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMZ92468003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd5806d1255eae1a552029714118aed6d96610b291bfb676dae6a7397385601. 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/QZMZ92468004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929009f8c043a2de867021031c1ede000cc400017dcfa3f2230f16102d71e6d3. 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/QZMZ92468007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04095c0f44b4dec31b961414a9ee87b08b949a76c8b8625b62d15b116a922fe0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZNJW2491869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64301772ac73f8706575e9b1bfb2cdb60b6c1790e3e37e3acc54d441af67f379. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZES92515519.