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 0xf33f1764fd70fb90403daaeba4d5b7837a0ed9338cc209bd6e03a9c35edd1497. 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/f69ac60e-6d21-4c7f-bd8d-0f01d59b90b2.json and https://artists.proofprofile.net/proofs/artist/f69ac60e-6d21-4c7f-bd8d-0f01d59b90b2.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 0x042dbb50b33818b9fd1a27b7a867ff8cbb6dd1a78340ebeb3ac4e4ae900d5a0a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62446899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb258237be9b6cad836a119b2bc4c8c66e222aab25f8eb51b3246eb7d48787cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2164635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce228a1447ea5920544994539d2733d31b9b30c41954f273dd98bba2385ca8a. 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/FR96X2011201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5330e537bc8f593ac9caf574a1f32799188df9a33f1494c1488943eabc5f70. 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/TR2181900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c93185e8dccd1b34ba9043d0f4fcec8fa4b69cdba6469b2949b219d589726c. 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/TR2181900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf661190618878f990f90bdbe835e7a7d33f8256a469f45780753fa8f1fd84863. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWR2184825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f84d5841a6161dbd188b066a2fa7631e668c96ffe6f6f7373f884fdd6eeb187. 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/QM4TW2081055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b8c2ea92ad27626c3c596ac0c77a4e0089fc78385b113d5c1fc64484455680. 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/QM4TW2081056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f1d8b2ade8b0100a9f4df33361bd3154a4f0879f4ef6d1232945338ecf5308. 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/QM4TW2081042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068437c6856256362d1c2de98d9bf49698cf06a5e8a875eb772dd2a09549fb61. 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/QM4TW2081043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd18af6872f5261fecdf03e44c7a0a59dcf04b53366ac1062c384fcb48ab2ba. 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/QM4TW2081044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeb130168273d7c1bef037a1a36983f032c2925b14c1ba5098336719a91e288. 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/QM4TW2081045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90f90945f9d9d7929f980e790624466d5bbc87f0fabb35407de37fac7339db0. 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/QM4TW2081046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2476e7a98bf90f31f2ed8a881a9a697dfb6840733dc5696f217224f24cfd627. 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/QM4TW2081048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ba8f013938152fb0a41612df80a8770710e3504825211688be340fb789860e. 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/QM4TW2081050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38145e8d2e75eb01b86eb9a5c24387b5927bef1945b95e227ae3f78a11ecf0b0. 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/QM4TW2081051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64512d48ed588c879d29f337f40748640256d5d9e6d98fcfec54928a9221ca04. 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/QM4TX2199931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54f513f9b1172a55488272c329afbb216013b7ae8f39d7959ca04c9702fef6e. 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/QZDA61961214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469636e44fd970525fded6d09399f3402bf1974c95af86cb6b4b60b00b2523e7. 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/QZDA61961219.