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 0xceadf1668a6ac25b212d2f5e3cb1af4160129f91d8d3196b59146d174d5871d1. 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/eb7fb603-c9be-474b-b003-52f31236b088.json and https://artists.proofprofile.net/proofs/artist/eb7fb603-c9be-474b-b003-52f31236b088.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 0x5025bd44871b99ab5deaa1d4551cb6b7343f9f59cf59b2cc9fe74e6a90959303. 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/USCGH2125332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5c4dbe57a254b152f88c49301ef1b0841fdadcdce51283d33c4b5ac6792fcf. 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/ES6081540301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb23aff4ed3f1a274be07d28362bd2ac0529635e5d9d1ec87a286b8b3f9e0896. 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/ES6081540302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f5a170e0799d773714324a94f75403619b5022fadb7af84371a3285a0c542c. 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/ES6081540303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a6e0502729a6977376d981fddbd0410fb89785eecd22ec806001ea860122c8. 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/ES6081540304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fca608605b81ed1d55f03a70c508676f1a66a64e825dcb2ef8ee3affcf0bdb. 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/ES6081540306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6346ef200868cbae1b3d3fa7ca74a8e35ea5db9ee2627ca0d11999efa3d1a4. 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/ES6081540308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50eccbe3c9f5c208bfc8725581c5183301a5905ed28a3dc9591138533cbadc1f. 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/ES6081540312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fdb4dc128b368692ab02991ff200626d5ec8e0bf6ecbddcbb869d4e8f53964. 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/ES6081540313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4853a4810f31b43e626a855c1fe14314f07253f8eeb1db1efef363dc894b614. 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/US6R21318108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7a48f4503d8f4920b61ed3edbf80ca3839acf6477ffb95d627ddfbf80b2a56. 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/US6R21318109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118d171bd20b8bd3eca34d185275aa47652a00fdf9794ce5abdaf6d633c01a0f. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/US6R21318111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367f71db723436387347589c9c9f805d31777efcb889538c74fa036729364267. 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/US6R21318112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe781c16b37571469d04892c4e0f4db02249264798f4d3d7508fe4859612e73b5. 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/US6R21318114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5023ed6f23aad4b605bab761b62d7f64e9a23b1d1179b8b3a811847c32479. 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/UKXN22224099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e82e2c614433fd390fa43c621507b53e2697c03a40fd9d2948a1d70d2c275b. 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/USL4Q1738526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04657d0e0887f0d4e089ed37adfcef0790e8f8e842c89466bb497367d67ae3a. 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/USL4Q1738533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3bd6f8764d8ce11dd5cc6761ed8dae57fcb6da9dc83b1ecd0a197321981d6f. 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/USCGH1738266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe159c41c77f4b90b6e7c220c11b318fa6fb6e8b81636be899f8f1a9838d84538. 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/USCGH1738267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fa2687a4cce7483879367ebfd0387198dffc0a622ac3bea8ef0da6945108e9. 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/USCGH1738276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d35fa82b28e8a5814a685b0570b8e0560ce6c8dba057e3480e050897ceb6d94. 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/USCGH2550840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b8887a25d8f69fb3a8e4d45bf4b40bb47a854e825e31976fde8f6bd35bd258. 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/SE6SA2485732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766fe787ec133170e156e1926097c6b35f9c009d5b0fd51d346454186ccad266. 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/UKXN22327720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0eb4c558297c71d7a1141c0fbd82445f9a966de2ec76a4555d101de165ab6. 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/USCGH2125302.