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 0x2b3b60b98f3c6e213c7d428f2fe39f053234fc67a3ab28dd553c0bc559dd0b8c. 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/eb742b5e-e407-4ff4-a3ac-c1f6af4713cc.json and https://artists.proofprofile.net/proofs/artist/eb742b5e-e407-4ff4-a3ac-c1f6af4713cc.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 0x10f318048516dad6f144a9596848500604facbaaf75e96e26e368cfbbbd755f4. 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/QZHNB2036187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda93a5d3843454416805fa9e5193bcefca01f4571ffbeabd580079f1fc9ca23c. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZHNB2036190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a23d166ab661cc358cd7d6f9c81d649b1321636a7bdb1d1502f4f75769346e. 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/QZPLR2099959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7a09e6f7fe9ec098ff7394008767c70b47af10eafed0b41cef90cdd233fb58. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWR2052367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb357e0cb9af81b8eca38927bbf9aac319706a08330148ad06f3e09e585e9c84c. 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/QZK6Q2081733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf261f22b24640e696220b3b80f89902f69805fac6a168186c54e2dac6cc4586e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42043725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b7d36b6f9aa705c0291120a40bc43a72c34c92c40d8c91c77d7edf8f766d30. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZNWR2052371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56c9acedaf46761f7516808dbb61f87325aae17cb9a702aa7cae7059a2de92. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:13:52Z), 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/QZNWR2052373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e85a6e0cd3b5f65d350b3d2b15d679ae9398fb7b16c01bc41ab20c17cffccee. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZES82112288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4096e09676688728f8021ebd4f03109dd535904745513fff557b5129c851c1fb. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZK6Q2107306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83775b6ecd58a41d6521f5888171f67c5564bbd77ea6c5f1e2f6253e4af8567d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNWZ2112623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a12317233ea5f90169a4dcc8d0a61b54f78cf9e51109935c41e991b387cd7f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:03Z), 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/QZNWZ2112624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7527a8a7d73fd6781d520ffd598c740d921c773e8c69cb49342cd27893e3f25. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZNWZ2112626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8ca633c726c4a637796e7b8f596a55b867afa9bb910cb57793e148f06f1fd5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6L2157765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dfde0717bd07863759aab2fbf235672511461445166527de90774259e82a74. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN72274557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a21e06e0f9421850fe078b5c5228b208cb2aaeb48daa2d1d20c61200ccbd265. 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/QZK6G2270045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6d016bd74b4e3fa940169f0d7a09471e3538832deaa963917c77eaadc131cd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWU2281499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e281efc009221e1e18d4fe9b04b15262ef1fe7d302916b38d9da460aef5cd0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:19:19Z), 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/QZFYX2380571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb85126a28cdaeca8b11e94411e6a3451d50f94d47c2f90b27b1c3d156ce371a. 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/QZK6Q2319653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ffc2a43fa8e4201e1274a1987741e63b066838f69cf3346e126e9e5a27bc75. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZPLS2392520.