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 0x5c82bab7f7631b5287812dbc84d47d1bb3375146283d6764c617c2ea9946b888. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cb01726-08f4-4278-862c-6ad1d4142a27.json and https://artists.proofprofile.net/proofs/artist/6cb01726-08f4-4278-862c-6ad1d4142a27.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 0x788b3b1d94c53dda80fe78a31bf5485dcacefd10e63ba8524bd75e4507e683a6. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/PLUM71800123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acfa79c1607ca574ff485d7412182744a1921ed4ad97dfd6cdb3ba2d1ea2a92. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLUM71800469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47663c7fad1b628993db9ec51a726b942bf93c41019e636d9987574712768468. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLUM71800472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5ebfcb0358e79fd05828b07c8408043972901b9b749f36a4165b1991ada7bc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:30:01Z), 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/PLUM71800473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161e376d8fc2e107663f274f58f17632bde7cbb9465aab7526632b723eb7b7b2. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/PLUM71800474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955a025626156a9b6ddb9885d34c81baa4bcdfb75beaadd98c466ae2bc59d5c5. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/PLUM71801172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7bc1a50b324eeeff6c1146800fc94869570595aa95277e8a828f26da4cf5c0. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:30Z), 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/PLUM71801170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a9c73a63ebdde36805f83b1fc7ab03b9f5adbe062f118a65d45724e92fc378. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PLUM71900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8353702e40cd890b2c7a8c80fb09c760990dbf2b5dad830155846275581184a4. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/PLUM71900134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63755ae9b4d8d62328e9530bc38c31d9f6ac904fc47045e5e791cf7be978da9. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:22:19Z), 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/PLUM71900609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a92e5e1c1a3dac58d697038d3ca3dc05a7b7e6b98cbddee5a1b2685889fa55. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/PLUM72000797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60151a03346748a07a212e4ffbdb20caeda0e2c7bf4b40adb4bed75ba16f9871. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/PLUM72000677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60151a03346748a07a212e4ffbdb20caeda0e2c7bf4b40adb4bed75ba16f9871. 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/PLUM72000677.