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 0xb1a3fe5dbe8522c2c0297fe588c881b82a632052af1ee8a65a7970606b11de76. 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/dd594fd9-f11d-4692-9730-be18af5184d8.json and https://artists.proofprofile.net/proofs/artist/dd594fd9-f11d-4692-9730-be18af5184d8.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 0xaa00c5ff9cbf80180391fd8c6cab664e05ed4bfcacf0bda6d81b2c36e2974ae4. 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/QZWFG2301032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85da0af9f5772e42ff969121d25311f43cd1f4598b4576be77fff47f9ed9b2b. 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/QZWFG2304507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03e4b06e0f01e332d8fcdf046960c5437bd56c788477aed5a430582c00f4201. 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/QZWFE2380288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d664c60bcd86b2c8ef6fc0111685531c66d37c867ab0d28e6c5f9bff5dfa72. 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/QZWFE2380102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe945b2fff6a9c68941acd060a43c1f78bb21b08fa695bd1723e6d92f26b2e9ba. 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/QZTBA2337642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25577a2b777a5197169c747313888112e2cc8ed450dc9e4155e3604df16bf5cb. 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/QZTBC2325648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090a2f538ad24a28991bbdba3c46e0aa3ae7a04db81416fcd0ddf3f1422b0c2b. 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/QZTBA2337709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94324f1cf13e7edccbecf3bee8861fd58b1a245b08f752d5c1d46aeae21f8dce. 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/QZTBA2313141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556350693f4f25662310abbbc60c92f5f3529111166cca9e9d43d4e66078cd4. 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/QZTBA2313142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08f580670ce91d8ebb3e8bf24c5f66dd091a6c746cb65c2dabf29112df21880. 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/QZTBA2313143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a00ef8e2209bde703952135ac1e3f91540398ba8602eedb327b40b73d8705dd. 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/QZTBA2313144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f4638e1d2ded4c16ce615a5b2504d8ea2155e95bb381ecc87f0132349cac96. 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/QZTB92312250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13bf970c0e81e345b09c855856b34b7fe04abbee7f2832d120977311591fc3d. 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/GXF9Q2590581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4cab609271359d1d40be6bb91524b0743520e5642dcc6647d566bf72306f78c. 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/UKXN22529111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a32f12fdbfc9b203b72addccd892b0fcc1579019e280c446d3df410222d83a6. 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/GX3Q92531822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89f9340cc86a2654cda53989a4e96b8a4b7759385d4a8b77a063b532bbf0fa4. 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/GBLFP2511448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2401c9868904344b9aae7d7d5847529e866e7c8ae105d5b09c01ff46a4745646. 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/GX53U2526381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4218e80e7cbcb2d2c33018ed7d2c108f1b33f3d8526cec459ba508dfdc1780fd. 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/GBLFP2529284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132915c54c3324eb1dee2bbf766283182a3ec9fc11ebe02f44b4943d8a6efd6c. 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/GBLFP2527869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41d5adb7f95a3d00e98b9de8172e827b554e0192adc018480c7367e362ca6b9. 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/GBLFP2518700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2b2c8b7c1470a1e9383b1f89ecd01c9a202ed89cc1283ace4bff36640161b. 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/GBLFP2500649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897e21dcccd72da0e86d2e728b7031370947b213eb952ddbed8f423882d7f843. 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/GX3Q92533819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca365c3f65600588371062acd6810178a8f84a011376a8984bf7a655284dc66. 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/GX3Q92530338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b0eb724b4fc431ae613557fd38d0885fdbc9a844d78c8b40aec3370f3df056. 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/UKXN22534251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e7eefc2776a704426ef8d20f7cc5e024aa096c71cc06299a468e7226344870. 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/UKXN22531057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea962a9105d457065b5b5f833a62ac85e0aeb745de62fc04ad7db30b2fac36b0. 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/GXF9Q2598154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03aaf539115e8db17d6a48649b89f95c0b151ed5fd04573b0a2e25994963bc1. 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/GXF9Q2595443.