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 0x65187d63d80801fdfb12c8c24f30f0faa2dcee66977d858760ca8ff64f23728f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/855a9063-4125-4f9f-92ea-c90b1b58e920.json and https://artists.proofprofile.net/proofs/artist/855a9063-4125-4f9f-92ea-c90b1b58e920.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 0x4d60f3cd6ee844cc0e06f5c98bacb8ea0f77084c785471f4cdc8ed70faac9633. 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/CZA232001081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28292a4f86ec399e78811dad7587a45141c925913b6103571393622416bf029. 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/CZA232001082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbf38296eb9af27658b9f42401acabe3988db75c46e0070a4c4e4375abe41c9. 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/CZA232001083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3f8e6ba65f3196572675e0ab2d6282166c0c46555a686bb9b253ce9e36eac1. 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/CZA232001084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24dbc87e63efe79114b3ffd8df08a170bf9f7fb0f4391c900924806daec8053. 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/CZA232001085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17c33caf3c9c180b0523bdc939ff8f39509c3ae03a036554a489382435a4b5a. 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/CZA232001086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b5bdfc9a3413cdc92be56df353a4a31f6f88a5bc5ec97424672e194429f896. 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/CZA232001087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44c346db27b8bc50a136d6769b881cdb42b2a42cb5ac3b107cd3b55bf442fe4. 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/CZA232001088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077a611eb426cabdd5eecf93fb4225709233c4003f8598b874a4fe9b12dbe1d9. 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/CZA232001089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8266f59b36eb60baae707f28ee91d0e4f3f0c600779f3cac282719ee193863. 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/CZA232001090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b0491017901c15f9b2a0be2b9bf1d8a8b9b12c57f28bbed8f308409d4dfc5e. 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/CZA232001091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4ee168e3a1e92e4435dbcd40078d3864f3734a7000d505fcc2c4b41811e7e7. 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/CZA232001092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a158a11075e7bc90232edef0f8769e022b41045b629929525efe573b51eaf7. 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/CZA232001093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f4bfeb910fe4fd7bad3091b46438ca84317fdbe7eae91320de21e9860bc416. 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/GBMA21969191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48abdc59966250926b9d5b9b646583770431b1a88947699ca39d1e3cb6fff622. 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/CZA232201095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be786792aa1e9144a49714c5e60802233fd14dc5c27c2918b4778e85d816b51. 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/CZA232201116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879b581c4a40a32e1e6f078ef0e375a9a45fad673ba86d5eb5d5bd3980e65672. 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/CZUM72100749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90322770c9a37311b0a82b38a3ebd35c11d2b40bef1b58456296d01ef85f9757. 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/CZA232001336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda17f4705b10019ce070e4af39a80127cb3b5b3f7a7ec156dd65d6c411541981. 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/CZUM72300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1748ce6a1ff390cbf5b74d807c3b5e5069dc5e89810e5e1cbfaf67eff0959533. 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/CZUM72100071.