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 0xb9265f6ba3eb8a1b9f5d66fd7bc88e13ba8303b3d6841dfaa9615682e31b1730. 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/0fdacd64-5872-4901-bb98-7e4aa7d5740a.json and https://artists.proofprofile.net/proofs/artist/0fdacd64-5872-4901-bb98-7e4aa7d5740a.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 0xbe3707e2003ec516f3b8a5a23403b15be996786b277249fe9d6adf7004070e76. 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/USCGJ2367618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da785eb97f9363cc3f488c3e9711e97d0b120441202ba066807c031570432fc. 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/USCGJ2367619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaff9673a1702f99e6b9413f20c6f8b473b29a6c85a79131fd399608d87044e. 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/USCGJ2367620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ed83e115f7be4b1682a908ec78a8e8776bd29c6654b587454724efa18e7f1d. 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/USCGJ2367621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cb88e8dc051b467d0d6e391d5f6da3118c399846810afa13afcf3e30845d24. 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/USCGJ2367622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350091586fdf9e2b9ff364f3988d8dfc7e8c524fbfeb5668df2f2b7d83ee5cda. 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/USCGJ2367623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b40e0f4d75bfc70b8898ca71f57763e60c5050621b7f079c4f39f081bb4abb. 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/USCGJ2367624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883cdd38d363d3d3c54a22569ca27662238b4b7ebc8e9fdb8cca7b5fd085ac9. 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/USCGJ2367625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a906b012a191c46091765af32f22cca04d65f5d3b6ddaa7c65cfc934205ef6. 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/USCGJ2367626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28e3f9efda6b29a881805050b543e77d5e0c7378728eef33776fb57296f14ca. 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/ESA011705155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac411333a042092744d2bd6762e3ba52688f85f00f5be030d84aa19a1122d90c. 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/ESA011705156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48c2333bdd52a42b4fce3e18d595e76a796c7de394c2c3ec353731b3d10da75. 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/ESA011705157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed4db90b703fa14d764ed7c0c07a298f2c812abd86075cd06be222bbc7e049b. 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/ESA011705158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1724741b06c69a4040ba7066c5c579143b8f3b147206f40ae9bc12bd9b59a58. 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/ESA011705159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c26ab15c1d1f71edfacbd3a439265f369717eaa708b09ed049afaea3c106466. 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/ESA011705160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e2ce2a610d754c50475b02bfbc391fce4c1117b46d4f9e246cc13c06502224. 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/ESA011705161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc04d19d6209a5532114cd9e50fc685c0e8e8a495ba71fda3bc067247b0a3e44. 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/ESA011705162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2809c371ff074a2210303802a6c0c191d75c3073f5a707db1044b2c6634e0ba. 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/ESA011705163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a889d598cff3d826ffac713e70143ddbe361ca220c16cb2081a1f507fc095ef. 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/ESA011705164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f62e4959b40757ca49ae8efb982bf4d0c510aecb5fa961744f0a33396eb7bc. 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/USL4Q2436265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6e54414c3d6bff3abbdb143647eeeedd2030fbc7c944f1310ee8c383f2ea95. 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/USHM82338436.