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 0x490263153deec7a69694e6e9da19266ddb2227be1754408259cee8d397d68fe5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c3a6bb9-bcb8-4d2a-b6d8-701beadd9f70.json and https://artists.proofprofile.net/proofs/artist/4c3a6bb9-bcb8-4d2a-b6d8-701beadd9f70.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 0x034bde8485fcf2e91cd456f4a2609366f1a41616e9a485f79ca3141f75a4ba64. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMER2265027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebf637d4f0382d0c3ae0e368210051461fa44bb14ff4aff22c1fc4739ab09ee. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYZ2364428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b6bc5450df391fc8334cb3e9fe54c674ef3d25085b6fa74840ca8830b412cc. 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/QZES72368856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea830e536c976e707f27365bf9452e52e0b423fe4207d103c5f8161935d3f5f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:11Z), 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/QZRP42339024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39dbb286a463e71c8f93fa8b7faedf379233423a92060a3878b00acce178f6a. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZES92493687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af9f9b9ef73dfef534497b9b5d0d54ee69401a1e226443a361d77fde859d6f0. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZFZ62514537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e92698428a505e66eff89b36d69ae3b929fcb145b0e5538c2fcd4c4152c6ba. 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/QZFZ62514538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b8115b6d43014e6a1cf0f6d89576d093ec15e8f8461b6849ada1daca8a8368. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:19:53Z), 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/QZFZ62514539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676da8862478fe18aa5887dd356b8372ad1c0b529eda14f62fcb56cf37b75475. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ62514540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d59536708e405d7b008f2bc2eb465c347efed6ce2c07de555dde9a96d1a31e. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:24:25Z), 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/QZFZ62514541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb5593c0f6d0628a456fef851f7fcb2427f4b9e769fa51d9907a546f198dc09. 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/QMFMF2330569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca27725030fc77bea0b1b959f73e8b678d94747581512f6530fc89fc68770e34. 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/BK4DA2401901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d4aff0fcab8aeed2c4b569246c135ece077b6fb62d5e6f3d57a0f06d36df0f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM7282494860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cbf1915f828d28aa93e1b42fe5ff7bd05da88f945e729568fc1d85e60befbd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK4DA2455235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b93972b954b692644c5f72a1ab3ea21df7861be92401de89392224ebab8e74. 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/AR5UH2300761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b989745a2b093951d479e57e9f76590f5f16c6f380cbfac9c3f6ab94c76fa. 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/QM6MZ2405617.