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 0xdb43d2ff05c22ee4ca84aa24b05b975508de8d2306f3c37d2d3d0b168f349166. 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/2eab5a3e-54d1-459a-9b1f-a85becd70278.json and https://artists.proofprofile.net/proofs/artist/2eab5a3e-54d1-459a-9b1f-a85becd70278.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 0xebdd06391f8d322e7b3033dd8aff1b235e329666273451266fb3de100e4f4997. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA61954161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b0406456d0b63e67876c057940ac3b58346ea85fb6c2d12a322f72617ee43f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZWFK2377492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908a24b24c380fb0faceb215cda8f2ad0fb4e72d71e504f08a20e3b91a9a35c8. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZHN82431364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309b3e5dd916ab6c224869cd25ebc64121d9a9b8eecb68c0d25d067550fad84b. 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/QZK6P2453356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe132e7481bfada7b3d2154513faeb78e4ca829a455b33a5379487aaf078bf2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZK6L2459406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c276b5da57d0e6f4b8a13d834028966a31cd37f942c75a1eab8f2ec8061dd7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6K2408603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14db933b1279f0a44767364b0297a59d5613d7fef23de64f7fb7e2ce5891828a. 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/QZK6K2409023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8507848c40e86595e6ed16d8bc7d2d16c890c982b85de82429b2f74b9aaa69c. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:53:46Z), 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/QZTAY2458236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bf4cbfbdfe7305e1c8efa1d82aff4c9897d79543cbddd7b6b0cef8ff489917. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB22412570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44c3e66a67c6b2972d8806846a89b9cfff1de84e8d6a07a697c76aca0e9c1c1. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFS2493644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc24ca1fdca4f4a4d7361380ac82b90275fe659cde6cbb9ab09355e0b2c5868. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QT3EY2400976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587f574fdf5562c0254dbc26a3249af1f90b0818003fa080e6fcb4446d1cc878. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFYZ2547412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79aab43c06c20de96eddac47085bcc367d15c46832f3131b447a56fb5791037. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWR2598137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49b4dd1031a1d2be160738d0ce0b09e71076f6d2c17b0e176aeb629bf6a3565. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAX2546915.