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 0x87c4080a4fd5924ea7d6c224f9b8b836b55a8fbf6bff86f2088dfcec96c2f075. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14132393-cd19-4e56-9fb2-4a7af2f75209.json and https://artists.proofprofile.net/proofs/artist/14132393-cd19-4e56-9fb2-4a7af2f75209.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 0x8b2eddbeeaf53cab3eb6896fb441b812d57462d39f25c06667724991997873f1. 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/DEN062400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a6af39ba7156cfc429b31ea3f5f5e79537ffa4d6490f1f734372e2d6b40c9. 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/CA5KR2421597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be218858a25777cdf193fa69c3fc85dbd2b1f09fb1e2100a0bf2d036f3dc903. 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/CA5KR2356213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd79b739b1745e318ef6e5da8bc819f4540265f08e2bf0cc6a92707b4c3302bd. 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/GBWUL2349887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb637a12bf5fa674acc962fa7ca9cb3dae67c36b1be02fd863cec4b3e84c5e343. 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/QMFME2245594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2145da4d1281b1e395b10fa840b082a9310b06809dc07e1c613d730465664ec5. 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/QZVEM2522594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8ec324e6192804fe80138da42f869aec9d7914af038f1b71f49383ec37330e. 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/CH6542512424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8229c00a15eb5b1ae10f4eb3f5001bbbbe8044b91a4888fd99a623bebab2fc9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH6542454861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653e872f5cbb47c32c085dcdf0ec1102ad7cabb69a28f7cd1bfbc0b39fc374a4. 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/CA5KR2491031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458b536ae7d4f837c971f60513d7a1cfce4a3d1cdd682559ccd1158a6bced50e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH6542442484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7438b79cdce024ece71ad55acc26edbcadc34c930ee736c024c8618c0a304675. 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/TLVEM2477129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a6af39ba7156cfc429b31ea3f5f5e79537ffa4d6490f1f734372e2d6b40c9. 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/CA5KR2421597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be218858a25777cdf193fa69c3fc85dbd2b1f09fb1e2100a0bf2d036f3dc903. 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/CA5KR2356213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26e86980839164de369a5c941645cc375fcc931734d499596e1f2baaf3f55c7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2343132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f3c04afd332b162ab39537888c022a596dacb5fc02fe998398c5b3a77a1746. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMFME2392600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7b912c5b1117cf787ee994ea332ef8105833e74c056710680eefbfcfd2fc72. 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/DEUD42429433.