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 0x1c9d872a484170ba6bb5ae0ef445b7bc3c6e5efa48a755708fd6f46f47ae1e98. 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/d79b0c63-48a3-4f91-b350-ac7c8c7fd895.json and https://artists.proofprofile.net/proofs/artist/d79b0c63-48a3-4f91-b350-ac7c8c7fd895.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 0x76b19acb88672d67f01c40a024865079bfb5296d44db448340a86d44d51292f6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:06Z), 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/QZES52545873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfccd7458ffcaad90985c3df8ab9e5a581bdcc4cbd60bab03733be5f55b6b90. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZES52545875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a8385aa5d99baec180c2d2768585805f439c25ff05decf601e752b1b23dade. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES52545876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba559b3cea292961c143b6317a76751a9539e124e71281700c7b806e301891. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES52545877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c9e5b7f3c35d10a5f553145d390be7e0fbbf4d89a41f92d2b4288fe6473752. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZES52545878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f84b6679b101798771c613999be429a3c1dd765ac70d13d3e85a4437644e27. 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/QZHN82597847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae47a06e5d8bddc874e018cc5ed91b3ff9c85a49d7afcb3c0e51752e9fa8d903. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHN82597848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d204aef3a6a69b2c8dc050c7f03a91ac94a6e289b16aac6f78dc36ac48fb5c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:43:38Z), 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/QZHN82597849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b7388c8119380bd3407672511840ad2eb63106196f7a4d81eeaf20e1ef14eb. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:09:29Z), 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/QZK6M2535143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c0c72d3693144df8384fe39a176579469a01957cbe9739f9614ae20357734. 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/QZK6M2535144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c3c2ad1f63d40748ebc968edd466cea12d0f970386718fb25833bfb78117ea. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7Q2534445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c7db6c43e1c1356430dd2126743de9b658a6e19de7d0ab54d65f202729a54b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT3FC2565701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a371f7b93907440a267c41130c2cc7c8dd566b25613605521d12e48d82cb4b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3FC2565702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e42842a7da10c9042dad02cc4f1548b29608069de22c8dbf26fdfbfcda363. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3FC2565703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be1e24e6e1cc5b78264a46b7360db682e9aaf1d713031dbdd6ae24d6a2aba35. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3FC2565704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3d31b551c40b7a19e9d79fccdc9aeefe798ba4b852084167506e567db4d26b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT3FC2565705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7109762057b596b400b8301309317c0187ba0c30b23c0b1d5c7369e74663d9d. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QT3FC2565706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1f756b4ad090ad84843360f7f2353090446b874fd3c470e6d609dc0852534b. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QT3FC2565707.