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 0xc47157ae3640d818419bb7b468d6c9cc4023e0c893c58c4245d1026ccbe8c0e9. 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/bc780328-7605-4be6-aceb-fdd69cde77e8.json and https://artists.proofprofile.net/proofs/artist/bc780328-7605-4be6-aceb-fdd69cde77e8.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 0x33a8b8c3a64af8bb126a16af35ae769871f9984da857a84c585f874f1c55efe9. 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/CLCZ21501571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fbe747b43482c1583a59658e863df865dbd83e4d7df5673ae151f20ef59aa9. 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/CLCZ21300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938e651ddd4a645279091149fc28a7ac5bb9489732598efc374da20b99ecaa9d. 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/CLCZ21601852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6c66f3eb68521e8993c8a4afbcd7eddf037fe7a338262c200245aabd311fcc. 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/QM6P42317663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aba092be6659ca0686500d1496d211126862084e52d395b3bff453490d7fa4b. 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/CLAA21900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddc49bd3503e30a96658243fa9a3f2a21c1898f24919d4fdb9fb0c511702e41. 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/QZ22B1628489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938e651ddd4a645279091149fc28a7ac5bb9489732598efc374da20b99ecaa9d. 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/CLCZ21601852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5ec80643922c704b6a5d5533e78924c0cdc1072de1c55a9d579a5a780101a9. 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/QZMZ92571162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf229663e7555618a30234bccc5c86d88aef4699759c32e2066d70c54213afa. 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/QZMZ92571163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951caccc46910e06c30c43f51ff33fe86c6bda18c7d41f83c175453858ac22a. 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/QZMZ92571164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fea34974e2e9fcc09ae2dc0a01214b7f89348c3ac5cd3109b0508908c6a509. 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/QZMZ92571168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde60a101d711c415ae6eddc61638f964157878c6c89b5103bec38c5b9483b00d. 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/QZMZ92571167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ab9a7ca6229a26bee329872da5916ea49405d839a04f1db6d8f0c21282b19b. 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/QZMZ92571165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b270adb99eba83effec58852a8ba9486858af605aaf107f3167d4c586f35948. 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/QZW9K2428380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6027b7cd77ba191b2c62c02e4c8f15634a719291766043442cf943fd16ffa7f. 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/QM6P41796319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa970239ea6d9171b94e4a0c4f5f96c5f1f77dec3d1f95ec15a5b53fc7556d04e. 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/USJ3V1483235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc76cc3751ffe68de22737fc9bfa28f6a417c8ec9f7f7809b9e77495aa165832. 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/QM4TX1839370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4366d3e9690beaec3b7fb9b0d2471f1fe4d947000bf8711b25eb545e70dd2e30. 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/QMBZ91740835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8df8f28f0515d21e55d611a3a418ce4e91ffb1cbf94a1431805673059c65a3. 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/QM4TX1839372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6672eb2e2fb2d3c900bd97e684c7d35f9b58764031c2526d8f895b3a8a08c6a0. 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/QM4TX1839375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf68ef74d9c9fd97baec264d142ecd4ab60f96549beff74251c1951aa693d89. 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/QM4TX1839376.
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