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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561767f265ae14d80912089ed3db6ea1707a54e5e435b187bc16c25a1bb2620d. 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/5d26b628-9756-4cae-93c5-890c3b52daa2.json and https://artists.proofprofile.net/proofs/artist/5d26b628-9756-4cae-93c5-890c3b52daa2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6554e3f9c53a26f6c0a5f923e95af39ea29b6225731eb56926af22163b1bf7a9. 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/DED831900136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c5d55c0b6841aa590f59dd479ed6fe47adf85494f19e1d44b12c161c4475f3. 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/DED831900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa221258f7e63315e934b188a1584502f334848ea3f6ebcae10dd71bb85157265. 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/DED831900138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6733e3305603fc1516a1d57f33161908bc9a77ea1ffb3b80cc67114815cb6a17. 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/DED831900139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd657d27976396b7f7676c50569405986412fd58757d4d442f225b134be558d37. 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/DED831900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a855ec829fd6984b23067843e3c3a40b46911ab9d988197177ef5b39c0b716. 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/DED831900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57de532f46a68bcf1c2a5679053db115312632be19011717dc3d04facc69441. 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/DED831900142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c06c61b63c351aada9bc444826700438bee065853c5f3efc487b8b6856d70fa. 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/DED831900143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade9565fde061b48dad7486c21b42ec6cb6940d713cf30488cac9a5c0a9a6b50. 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/DED831900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddf1774b251fd060aabc9c253507221cc7e9bf4c70602ab01471b9bac7aa12a. 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/DED831900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320e4a8af4be926c0273c54462d0e43f1c45bcaf31e68c1a4e2ca22698b65c8d. 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/DED831900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223fb91471c141b3d7ca8509f548269d453a83ffe6b88e1bb9f65206501955a. 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/SEYOK1734090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe742073775fd44c0cb443e3a02c296f900b65b2cd493ac4c28b1b0d3ab413e26. 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/SEYOK1734091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0285fa65176dce210f3803dff6a820a0cd57b71c5184dedc3661eaffa5e36eec. 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/SEYOK1734092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908ce304951e1929d0f5a59a8e102ae57fa162d94ba348f53ea9e85870cd2f28. 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/SEYOK1734093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71372235e0e8b3e304b10c6683936ba73fac807e15871765dae0e8d9897f353f. 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/SEYOK1734094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acc14fab9d2b3b3a3d16d3c953bc849995b97aa31604220852a337a0bbeaccb. 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/SEYOK1734095.