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 0xfb9d59c59728a7ec0aab2e0c5a347e428c235861ac41d704a11feb8086146a7c. 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/420da075-be6c-4ccf-ac3e-b34d181abcad.json and https://artists.proofprofile.net/proofs/artist/420da075-be6c-4ccf-ac3e-b34d181abcad.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 0x00241f18bd8e748ff4775ffd267669a8cfb93760cffbf5b69f885c9a56a8694f. 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/QZES72355672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332c34a9032c6ff8622761b50c0fce8954e899411caa3fda23824fee6ec8a214. 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/QMGR32276825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c93dab24273dc89cce8b180109d9d3fc4f290d74e9216e37d8411f7ba1fbfe. 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/QZES62456203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f3568af285264d112bd6ad44ee532d09b78dee4868c5b19aea625dec5da55a. 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/QZES62456208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3ec4d8a0c2523036ca9b7dd26568b992793526221d5fc42c72a3d20d5c93ec. 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/QZQAY2295124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba5a000e2aa225c921d8c6edf5e148bb32511735d4855cb5c6b3e1c2ca82c2d. 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/QZQAY2138780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d055dccdcb322ee7467641825cd74b2df299b662e24bd1b40ae5d80c33430e. 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/QZS7J2221112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee18b8ceb171b8dc3e470a4d6bad89df8acaa01361b288b816baf2c7b37eeb26. 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/QZQAY2248425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a33d0f60b5841afb1e5f1fcb67f88aaaf4ce28626af51262719ead6bc67ca0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QMGR32276539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332c34a9032c6ff8622761b50c0fce8954e899411caa3fda23824fee6ec8a214. 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/QMGR32276825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2958641417277dba832f4de87054884cb0243291fe41a3735ae935a9a0553d1. 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/TCAIE2400440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef77cd8dc5e3b8371dc640d9b57be75cb8fb75b5908da4006c9d52142039e4b. 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/QZQAY2395102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14c506e70812e87ba5210488849f3ac9a55ed974c398074522beae8740204e2. 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/QZQAY2376891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dda91bb11da17b26075441b026643cda017aa70fcf8f61276390768106778f0. 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/QZSYP2244439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d930e1b33f5248f2bc012b037511a37bfc8a89f8e6f02863663301951bb959e. 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/USLD91741041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee18b8ceb171b8dc3e470a4d6bad89df8acaa01361b288b816baf2c7b37eeb26. 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/QZQAY2248425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd3f74976624bff5ceb187c0ae410590bc58276aa4a8d237619dc912b94d74. 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/QZTLA2223763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b825e0f87e564d2404027d5aea822a26bcc637515f8c3e76649c341a729041e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZS7J2183440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba5a000e2aa225c921d8c6edf5e148bb32511735d4855cb5c6b3e1c2ca82c2d. 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/QZQAY2138780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fafb722ac8702c513e0064b2b03d11aed27d2cd8cce476b0d5066091a3599d. 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/QZQAY2116632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3eb099f2be5b5caef09b8ee09e3a06e5a4a658787eafd8d947888d2a931c48. 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/QMGR32101090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f7dd16e78c3701c97dbf5dfbb269f9825619591a2e5460f6fa130d8f96570c. 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/QMGR32124335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633542f402a6706197ee6e9a673c5f55f2ef8f5d7153f0e76fe4b1fabec35b99. 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/QMGR32001938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25b108d3fbb8d6772e0d7011ef37696b990687e3747e808d992a3c808d68281. 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/QMGR32062818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fe43bdec5b326300d4cbb1148ba38ddbb5954e6fcb8d79fabf93e78b7f7fd8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMGR32062819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64012c27a6e07e435b208e9509e25402703ae5cfbcea83bf3cc88b6521329642. 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/QMGR32062820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b44cecbb3997b4548e670579b8960e5a6e757dcf85d4877f8a90e01683bd6ad. 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/QMGR32062939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cd1e1740c1a6707af50fd5436d5dc0acbee6eb4e4fe1bc64decc6dcb8f7817. 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/QMGR32053890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11feafeaafe0e9a7181e3644f63e3180baa3c3033d20ce3edba7e233d29e737f. 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/QZFZ42289024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbebcc2da12e6d98080e14dcb18c40d9399c9bd48cf8db34fca67e10678cff52. 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/QMGR32092393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b90cd7a22ee6599d1d495806bd72585badb7e14f714b60bb0addcabb1eb0b2. 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/TCAEK1977968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e293cad164073f22288f1ef1c3517bf7a31ef366bad0de47d78ae87c4ed709. 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/TCAEK1977999.