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 0x60ae43749ba6f5c322435d53fa979bd288641055e2dabccd69e2d6372c9ebd09. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/243577ba-b067-4eeb-822c-b99ea8616de5.json and https://artists.proofprofile.net/proofs/artist/243577ba-b067-4eeb-822c-b99ea8616de5.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 0x6e7be3abdb65766bb0a02101d959bdfb26b13130f4b1245a1f1d6baa8406f5df. 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/USHM21614114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cb7c16382d84b38d1c939324341964fbe10e500149adaea6e2f69bcc27864e. 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/USHM21614116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27218296cc79cd32449020d5ca20744e595f2a1d19b49998685a81c78de8b9. 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/GXBAV2460999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5a972a8a661d8d25f6c4f70cd39ab1476a44c574eb1f94a27c3b6359a00af7. 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/QZDQH2271609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d11b404d0c9c0b7b06bfbce1efd3de419db91732808245ae5a4e6ae5c6a4db7. 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/USDXS1805837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed5446630aeaf4a50e50451fccdb59eb4fad3333e7be40f69fe138501fa3467. 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/TCADI1767681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59fccd2753cabbf61e78cd7c47f09bce4e1c675d755281fe2e2ae81478eccf9f. 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/TCADI1767710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f09104faa0f28180827aa994ee09860f90b8dfaa4e42a4bc127c6408bc6f7c8. 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/USE7D1500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed1e9647cbca8749f7098e22634261d68cda93a7c85c69dedc964374363dfde. 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/USHM21497778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e5e24e10f7fae209b3580bf6b67bd8d0bd62e58c25f38f8e8e6a9012b6b9c4. 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/USHM21497779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef675095e48fe2de7e74883fb6aa2aa6b78b9f23dbc0569542852b9a47932cfd. 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/USHM21497782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b98484175a8ac34da7b304bffa3e57d0eb37cea3b0d0668966cbd328ac0e5f. 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/BK4DA2503125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7256b8300c879d1cdde10c3ba7936685339f29462081ae64c9f99968d5e7180a. 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/BK4DA2501688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361ee49edb17573eede6f08dc0dc9db2742b3eeede256a79b5d632359780b8bc. 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/QZDQH2441397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d0fa67e690b180599e3709f6b685863a33dd434bbad9f39c4784b582b5865c. 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/USE7D1600017.