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 0x346c6d1c5f70033d1ec28ed8d08274394d3122b6a7a2aab6c4b99402fa8ae9bb. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dda30a2-610d-4ec2-9225-7f4688b3f605.json and https://artists.proofprofile.net/proofs/artist/0dda30a2-610d-4ec2-9225-7f4688b3f605.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 0xf973c295467fca50c092535d34dee90ab85c61fdde67f2b62dda55b846810ae1. 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/USHM82382151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0330919f6c7d55574808374f6a344f74139c94a7727116c140aa18d44127c87. 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/USHM82382152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb457a08d268c7e5f278af1982519e9e4323b77e9c0d93798784a3de9a373427. 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/USHM82382153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb0f9d54b5a3547706ce6179377a7479feeebd65991c4e7e966c6b93e6793e0. 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/USHM82382154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fab43984a3ba39eb70610d9815451e86da58c4ce26a8ab19bce62ae8275309. 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/USHM82382155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3beb021024c78783a1caaa4c2fe57ab0e22500766a5cbe087bcc058b84d1fb. 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/USHM82382156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fabb55b34bb62651652363e4889ffc1e844e9120fa5289f32bbc2fb8e7539e. 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/USHM82382157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01e8856078ce156f0438f5946e2b6b3d3427d47fde3fe68c1f87c13e734270d. 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/USHM82382158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628241ffcf74f10abb9e8685415d5e11c71ec048e08d8cfa48ddf97f64c3f544. 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/USHM82362086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aa76f4e0541a7a76cdb27bff04b38ee59a0db9d33d254b6947d3ca2e34ff31. 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/USL4R2169379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0581183c157b48f818ba9dafac162253141831c9328a75e0107fc39655acf09b. 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/USL4R2169380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0703d9052066fc393f794584dd5b5c06f8bc9518066f33baf9d1e0c4c8833a. 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/USCGJ2164881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e55c02921a6e30212168ec08e2baebcae472f32431b6b6ecb4775549451e48. 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/USCGJ2164882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb1ce5298c7801905b372516e4e256a4200a2b499b88456cb0467c0d5c198d2. 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/USCGJ2164883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf53d66f978e73785888c520df30f1fa469a15292e8131e248f08b7a89af20a8. 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/USCGJ2164884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c77dade693999d6ba8ea006ecc277cdced8c63637c7f911fdfd3fc3420f1f1. 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/USCGJ2164885.