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 0x1d9d0d6d7d5ed431a41e2533b482b923b829723a6d9602f4f418f30ab7e4dcf6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52976677-7ae4-45c6-8426-452709936c04.json and https://artists.proofprofile.net/proofs/artist/52976677-7ae4-45c6-8426-452709936c04.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 0xb355c24e665281bd8b020bc05ca92fcd103539a76859765dd97ac28eeadafa3d. 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/BKTC52300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1801ad6e119f8b33676c0ab3c51fccc5b0ec52410043f0ef48f3b3a2712ed0a8. 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/US7VG1455214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2473ff0ea367c229d88a064df19950b6194a21253a8db3e9f93c9f5c873e72. 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/US7VG1455216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab79e97ab33df409c21e0cffd97c2b65b2a27314483f23d6bfe4487da498bf7. 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/US7VG1455217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef61b0081695e0ab70fa10b8bb948b82ec61482460a39db1c1408df262eefce3. 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/US7VG1455218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a48b585b2a8f28657ab6db9a2dc25ecaa735e597305989910d254497467c0. 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/US7VG1455219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197ad6a730501cdd13000a674e9436ccb400ffae86ac529846ffd72334a65752. 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/US7VG1455220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4119fbde14d0716bae632bf179ba7d47a11605ce3d9d0b81cff4c6d28d1e5f1. 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/US7VG1455221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595f4e5ccc38e43b9ffbc93c30efb5e40f2d83ded6e54e663fedc139fcbb7703. 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/US7VG1455223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c44a310a4262b0b2a780155737606f54813f945583c8007e79ba9ad2c4370cf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US7VG1466471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5cf90b0bd300528885d24f812f5283059a738714a05f6eeffad71e5981b882. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/US7VG1455215.
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 0x866c88e4d87c7c490694bfff31f73656d8a1cc0b4d4e8de0cee7e9068fde6ff3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US7VG1455222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed95826201bce3cc761d149149225750f1613087afdbb929f64a3dcb82ccca83. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/US7VG1466454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0da5c2353a955d07cf58e07a5c2e71496ca1c725625ec57e9c2897b501eb24c. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US7VG1466472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c92ed401ec05ffb64027cddd7d403cf9e32be9ac2d35c2c1e207838871d5c3d. 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/BXKG22302153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aaf428e431a9033ae3618b4018635ba70cbef9005b7f13bc1c1c33f1fd5fe9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BX7P32300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1fc2dc6b64259cdb69c101443073788741774dd9f6ad58bcae79481031f491. 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/BX7P32200126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb710fc36ef1991c731d0a18e1d4524511a27ee57b32e14a1070244a3cab45135. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BKTC52400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f85f828d898d4fcc19a8299fa834f3f4e7ce0518dcd8c41550884fc23318f7. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BXKG22302093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2895dc745886e37e8855981af5f30ab87661a68f9109278766d9ab848d2990a. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/BKTC52400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797aec2e370b0329fce032d4090c179e29009b25430bc4c30a00608f8e44b389. 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/BX7P32200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf766f646db9a48a1c77c6a2ef31d34be445aaad62d2d540c3bd20eb420a3078d. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BX6W02200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a21929d3c6fee28d8bbc386e32a917320127ca30004d7ed6711ab9df327ca2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BX6W02100028.