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 0xba875237e18e3d7659833f5d9ca42a129f12a1f877965af4aec0418b5d7a7b88. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee5b53fd-d06d-4ef7-88de-1844df953fc6.json and https://artists.proofprofile.net/proofs/artist/ee5b53fd-d06d-4ef7-88de-1844df953fc6.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 0xf07a64f9e8de3c25803b4d275aa6ae75701881aa89795ba5219a01eda0338cbc. 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/QZNWS2384279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5048189f794d6bc3be0d6b87e13780487d54ea36202b1520afe2f74d91e27ba. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFE2396758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4862c07e3b4029b4100be96d38f6af3834b90a0eb69e447c0cb655b2f2a1032a. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/USL4Q2456842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab0f2899be7e9590f496aec3fd257471f07b3c7a7bead5f5b5498db3c96b420. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/USL4Q2456843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680391f1fba2b26da225e8401db8031f40615e8befe67764c0dafe3924d0666b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USL4Q2456844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdc4fa852e3bfc60fe6fc2beafcbc996f6cfd6679bb88fd1ffe7ed715b01bdc. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USL4Q2456845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29112fc4ebd1fe47052267682fa4277d83fa49939df56ed40133a06d54f76941. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USL4Q2456846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8f74d098b74852a2e49ec0cdc41a263417f6d424551fc79e0baa3ffdf11a84. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USL4Q2456847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762b53c056a79d3cf574429f32edae09b1a7b42b896905fc8657312a58044d41. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USL4Q2456848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582e744e47ecfd775e75a56a019653fd50fc0b605ec18cbe854d3a1e8100051d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USL4Q2456849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4fba1f1a20d57fbfebda37c297e10fc2058ee28f1b9a03fe723470110c873e. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USL4Q2456850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4378ed025fa103a17720b8f4670d4eb507143acd612746f1052f88e1561ce1c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2456851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf185fe27efa198f253c7fdbec54941d53a872b638d94a38366c12e136ef87a75. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USL4Q2456852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab3ae667cfad62ddfb99efcec1340a85c3bb5347bc606a4b6bb215ed5aac4cc. 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/USL4Q2456853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa993ca8930142b20fe8452b0d162396d830a00091a0af8bce79b7b0799bee911. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2456854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7496e6d4d4baf6d6bef13e1aaef1b7a947fa1c18e3fde3b1680402e00497c0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2456855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700fb5079c9e76c1f4b6c3548d63e539be6f9dd1817300d32d9aaf1f9411b419. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USL4Q2456856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e76535e180ce5fb888d3c06a4a4893eaeeaa938e3b8675ebea4ba86184e5c7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USL4Q2456857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf94f821185fac4c3eee07c4d4eb6b318834d0438a3f562cd06fd33f29012ee. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USL4Q2456858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f76b9f2bdcd8f40cc34a8996247b7b2d525bdc76eb351dc4ae23b31d38dbf8. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USL4Q2456859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9f9382aa8bce468719220fee4516692002d13282a171ec2e0b312e0c1295f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USL4Q2456860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c37e29c1b98b3e0e96de50e2186b974e89ceee334da872f39b5326deee3829. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USL4Q2456861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3515a70a21a63c0e437d8f96aa10efe9b3d00a430be8356650b3e9ebfc799fbf. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNJX2465552.