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 0x9e97c117a47be9512837289386ba263aec437140a6c1b10b584aed2628fa00d1. 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/bf19d4f1-aa00-4a50-9fbe-75307a10341a.json and https://artists.proofprofile.net/proofs/artist/bf19d4f1-aa00-4a50-9fbe-75307a10341a.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 0x73c92b86e08e28e6db52e128216d611c7d22058164d35c5ae6d1e67f1a593ffe. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:08:16Z), 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/QZ4JJ1920657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d08cc39461c49e5ac983aabf639c8d1aee467877996648b715016201fb74d73. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZ4JJ1857320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178d9e8a6ab746109040302d73dd884efedda386bc7338883007a8cece20f87d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:28:04Z), 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/QZDA71962636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c052ee7f38d2ab909191bd2755828cf19901785658373ee0e9e8fc723d4cd43. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZDA71962639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e153cf165c3176015b738eda45c56ee4818f523a7aa1e89f0f4f9d5f7115b1. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:49:21Z), 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/QZDA71962641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8075c1e9753e7f209b186ca76ea78bd9a02c2482d10944d4f985a1471345d0. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:33:55Z), 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/QZDA71962642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd629eefe3fbc066ec2d57b7542a5de31d68f6a9e3057038f9c616306ce82a88a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA71962643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96cbd30b09882a9c06063beba75419e5066c6e9b97e82932f0a476d1953d3723. 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/QZDA71962645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b28f1e6db6f1bb12e183864d110f1e0ea6cf1709e18b99eb9760fff0c95ddd7. 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/QZDA71962646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a86064d591bd184e30293b302a5d0cfc776244ea70cae88629023d6eaf8217. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZPLS2179386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6223eac61633d4f1c3d0c3f661607ce673ed1f6df217e4b072d931f90b636629. 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/QZK6G2391858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d817ad3aad878b4b1555fb95613ab7606ebe1d140143d8dfe736a7929619e0. 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/QZK6F2348630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1230ef8b3f7a487887f6257c758888863de2f6267b2c084263330002b0432300. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:01Z), 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/QZHN32300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8c122865a60c7a4cc358663774d2790f081319f53196e7b01dc1aa88d9c3eb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTB22369460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75b85e8b93bf09195e11e34e2fb4719ae07c47db7f551d20a161116d857c4f8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:24:24Z), 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/QZTBF2360673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4113a3eb9284ecbd774c4eb9ab8c40d337c1d2dc842bc16843c229ef0b0930. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:07:38Z), 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/QZDA82459330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8628cef6f5350864df0a29d45db4f60dc790bd2d94d04e6466dfccbf1bea6fde. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN92438813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2e5589c0c7590892092ac27e7f857d18c1e6918312bea224d56b50a84f5a32. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:23:44Z), 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/QZHN92470969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a8f2af59b232503adef064c9acd766d55a8d8d888a9477976f7fde0dbef677. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZMEN2415351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7876c302026f4e63a8716cf061b2db5b0889d03a8a0e93418c9848addac1df1. 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/QZK6Q2471253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff55f7b16e14349f36c203b23e6f9576ba4e318fb48fdde9f6a8dbf086cfb5b6. 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/QZNWR2405188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ffdb796f15d21c3fc20e69de83ed4f688bf88e0ae5a1ad2af640d9fd3f98c1. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZTB32453890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e71321e9ca09a453ee3c5167cf2c03a5b224b95b26e371e075a57401505c92. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZWFG2434723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb96f0f7d9dfd6e74c5f1503a1d7b11aed3e032de6afbdafe00782f7920976c. 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/QZWFX2410941.