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 0x4ff552b10988eabc570a7a8b01db1ad007b3368872ccba1b823e47a65f5ad4ad. 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/6233ff5b-aeef-477a-96f1-11063324803a.json and https://artists.proofprofile.net/proofs/artist/6233ff5b-aeef-477a-96f1-11063324803a.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 0x72540c48c607e5f6b81364e730ff826d78458237fe157b550a7547558e04c127. 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/USQY51775112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31e786da4eb45601b27e786b91abb632107588b5fdcaf4576b08b1faf72a425. 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/USQY51775119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099bd9ee551fa3fb68010671aef355bb976ed02a954252b99a51f9dde6352d3e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USQY51775117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d414f198e845aa45be44e239c9be321652cfb846f40880f7c2629521c2b5a1. 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/USQY51775114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8db909c3347b3efda0a0fdc3365c498e59f1251f710b9f9e51ef5b9f91cfdb. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USA2P1807059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d390de5c9a7f3581cbee7a92b45a27547ea56576013ebb0cc3b51910b23afcf. 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/USA2P1807058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb89aed87aac0b4b021869653f925093a35fa740dde9ef17f5449d7381b97774. 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/USA2P1807056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1419c1fd1fa13f44e6b86d29c969642f8d54dd25c0be4ef4e9a4d2d7944e4a39. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USA2P1807053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac247c393a70b39d5657382de78ed0ef1baced37ff895bfe46ea61953cd8ec5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USA2P1867515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bbb9feef4d5a4f4dc67c93a692caebda21f863c3244baa1a64db03a9b58eeb. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/USA2P1914536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc20739893f3283fa1ad77cb056e39fbe3d74d3de5e75696ca4a19ce828ffd5. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/USA2P1914541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde47afd026ccd823138e829f5ec13817fcb06903efae20881a340b38f0d0e034. 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/USA2P1914539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14084d9566f8bc8699ef47c87bf38b0f8a78d94cedbed200fbd69620b4703d3c. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USA2P1914537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5693365d4871a85679a23262e2f32128ff34af155ddac157bdc87f8bd2a8633. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES62070093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c043cc967baf6db6027fa643e587f1ddd3256349581455e2eb9a8d0afc694fa. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USA2P2007788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6de0e2df53589531a2fdaf99c88389e4743b63131551f4e31e788ecf6ecd735. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P2007786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0a982e39a16a8090ca6f1d357367366efa8d7900ead568b88127f7b4176769. 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/USA2P2007784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb607504498ba4aaa646127e84cda92d3b4da7acca60a6effb9b44f011554f136. 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/QZQAY2199898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e15a66e8741baceb8a0d457a782cfab1258abe5d21465e4b67eb7b48bec00d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZQAY2194569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad28af3366a27fc27527cb5b9cbd7e8b4d0350b6e99171f473db379d3ffdac8. 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/QZQAY2164702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cd59899adf1a9992325bba7352027d6a554866904d1f2a4e71228cff8ffcd2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2156919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62257c0767f707e1f6ca45505dc8cec23b3e88bcfe8bcaf1595434068c10dc02. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZQAY2176698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b41ef4b78b49b0a19c309a358333761af564763255fac0ab2d07ef51d97ad1. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZQAY2162251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbf0e40025c57740f448f891971ddb94509383e51e1c5a43d0a14909f3ec4ab. 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/QZQAY2129161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0084b983e8d1c87090224811135bf503ab7b6fe91bd5fb916e2c08a32a831012. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZQAY2120788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602a934cf310c62898b565d13ab192806ca083447691532a033ba9a770a15f68. 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/QZQAY2140835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2339a4802bb1647eccbd835a6d63f29a48df8dd9fd8a62f797d80d66b407a3. 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/QZTLA2402501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19a60c9473e4e93d76a6bc7dbb1833c225711e262799f12adcd7eef8cd79f1b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTLA2498631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8050be7b35b94f7554568c16d6d53b58b1082a43a3b06ca118ce2cf0ec442c4. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTLA2474897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ddb125f2fddd09785069871b3dafe579cb18858dc24b239dc63c37fc18b462. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZTLA2438457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df81b58d33ba0029d0dae8be6f02ce3030792930b3479fa5f3ffb70b33a3770. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTLA2470833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77e7e29b5d797a27d0ab26a7475b23d0d3ff58e791b52e6d66f597d7aedf73a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTLA2421224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2d9b27da4fd0ea749ff45d523c9ec897fc74dd3c605792f797c172b15ed601. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTLA2451230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eec8760581ff89ebe0d86332e0d06878e2f981cb07da8ac2d86367b06cf2fc. 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/QZTLA2440468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7376c9398c9d731c1859dc8ce45607b1d941b528d0815eb7aae5bb5631d64bb5. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTLA2490626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f21ea7d16fda8388e6cd3a6e13c20fe96b5857bf09920bd72ef857f3cd2ccb3. 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/QZTB72391466.