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 0xb882afdf3b1d8981972dddc61fdff1fee3d362254600332a96149091d03d5000. 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/f4f25f9a-b10e-44d2-8b3e-fc0cd9d6b856.json and https://artists.proofprofile.net/proofs/artist/f4f25f9a-b10e-44d2-8b3e-fc0cd9d6b856.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 0x49769cdd071ce08fae7b48823b25d618449b32383a1ba3a13314de21ff9fec15. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/CAQ8S1616295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35427d01163ba5a9e31ed631200075e228a4014245d2f36828371a04b107de1e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAQ8S1616747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68108303dd526b2264806c1aa66d63f7e4bc8fefdc2a2b465b47fc795d7f5ad6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:07:53Z), 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/CAQ8S1617813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e998a43c551ede7d5b3a03cbfde20aea5c0768a5bf62358feb4a6e5e550c88. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CAQ8S1619572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02331974ec468ae53c4da0fe80b9e5d8e59dfa067aabf8887a760540322e051. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CAQ8S1620252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb033bef1c4fbe2affd35d1cc2e79776f7bf40f5a0300c092b38d398096938f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:33:33Z), 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/CAQ8S1621950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f62a9648f7cddf3fc96d4d110e95052ca027a7ad576b8760808d19bd9a6134. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAQ8S1621811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2769a22ddb1762af664828bd3b24d9aff562093f13739ee1f37e077442188639. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/CAQ8S1622400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c08006ffc66a065688bfdee944dfdcbfc131291a10d05e7e5b34a8c320d71c9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CAQ8S1622090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791aed71ba4acadbc048a601020b05b0736e73ae0bb7bf6e23d1ddc8cf5e585. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAQ8S1622654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630c0f8bfaee80066398d362cbcdf58ddc798403b0c0e9fe64b3e900b9656a94. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAQ8S1623195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2da16f07031b613028eab1b10dc37415e24e12111ea956878c36c15c8ead7b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CAQ8S1623262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c5e8710471b05c6767bfe16345cf7b64eb6e4b11fcaec82aed49d6581fb91. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAQ8S1623251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc231d6afa257f5972e86fd29ee66825f5fb2881dbb3d56e1a32f1d28e292de6e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAQ8S1623690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18eb059b21dd5396b2e28688fb17b430eb1c7fcc7c4845980052ca1432d5368. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CAQ8S1626529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6af4e65960b67845d8f2375b2dd850e9fa96832bd22afd4166802ee498394f1. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/CAQ8S1626362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e1456add4fee58a36ac2df4bc02cd1a8df90060255af1ad6607611c80fa957. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CAQ8S1637061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a0c3d0496339308a7a4823c7d4782c2d436847924d332dd889b659a145587e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAQ8S1637665.