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 0x0dddbe925a6b029d58e9a67ad3b8507d11302286dcc1f45aa99e6089fe1873fe. 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/f37dd7f7-c916-4c22-84fe-6bad86731c16.json and https://artists.proofprofile.net/proofs/artist/f37dd7f7-c916-4c22-84fe-6bad86731c16.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 0x0fdb3c8a74aba8efb9ebadbd38e8583899af3e004f80c76d97956098f54fdf28. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZNWQ2498719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faa921399c6ab28ab1c9763bce05384778a092ccda3481f0500bc18e9597220. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWU2381656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc138c478ff42a21b97d48623f91126c516f539b49903b79668ef92fb5f680a78. 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/USA2P2234945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce210fed7e6f3f09c36634c7e4a8105aa41016d6e11ae978d66a4deb84e26d8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITHD42200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe6ee1a02beb4fe62d9dbab80fa95af73fd8e09cb363857e6de0e0dd6a8bbdf. 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/USA2P2401331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b5d165aa8b407bb672c492fadb83d4c3d340d4efb63fb1cbef9e047752bb9d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6H2429299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b0d613a244ae3fbfda213369835ec6c3a0713b9b75e0426bef949859de6bc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:52:02Z), 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/USA2P2217623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85cb8af5cb262e65029e03d473a9fccd3780436c1484ea3ffae10b719b722d5. 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/USA2P2448997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd57704116dd1da5ab102f5890bbd1408f61a502a9684d0b81dfa9b78ba1815. 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/QZHNA2466472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620a9ac460f5321181c1df3cda1ce0fb82c9b0a5cbcc9666ae9396884178d59f. 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/NLSB72100416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2f8f10a01735f89adfc98a58bf8a55b638a3c77f63ae92227a546037eb929b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZ52154563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a5da48983cef7078cf21d0dc02a43075a5a8fac93bf058fe02ccce6de40490. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:52:49Z), 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/NLRD52018938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c4f29888418605a1a1ba4440805d970756ff822625ef773b51b53723f329b9. 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/NLRD52018927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e70360d60309e86c678161ab5ab5b44263764ec55ff9e9c99bbaf966a82f88a. 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/NLL8M2100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd69420cb5096cf0e7f0704365e35ac6ad84d786b7e4308f8f59fc8a331ea75. 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/NLRD52017947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98614b0352979f76e6f24c014770b89579541d40119b8c08063367406bede90a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6H2027637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8281cafca0fc6d18325a8586d7f54f13e6699044609af8db154fa1cb0fce41. 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/TCAEZ2097138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2233b80995ce31732b30b4b6c8305492851187e3e0bcccc9c73ad5e9aacc628d. 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/NL1EW2000003.