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 0xc066e1df468e60e1f4c53c28daef801221fb335384ec9c02adfd5b9a17290ffe. 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/9d9afaed-cbc3-4b6f-baeb-30820043f3aa.json and https://artists.proofprofile.net/proofs/artist/9d9afaed-cbc3-4b6f-baeb-30820043f3aa.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 0x2720bd87fb4c6a8a4937b38f688d05f412468d549c08d9896bb026c56075be61. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6J2034847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb36ef3eebd47f453aed9972b45b19bafbed556209d76cd40e8a0118066fa966. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZNWR2024402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc598ecdc4fe61855f5cd1798a5805a7f14dd86732717514c001e8a33ca1ac8b9. 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/GX3HH2159389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f290b4fa62bbdc205cd058be822242d82ff64a9780ee3f4147727a8ddfe26b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAU2180095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc555f5062e488e47d4c403e26b1cd935391de63ddaf231e4b71c722226eb863. 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/QZTAU2180096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8d3b81338a029090b3927e71d45efe5d8a024280754a5a64fd8ac207e10b55. 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/QZTAU2180098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c17dc4d86fa317ff3b731282450e3b7abd1a47c1364c081ca6259af91c022af. 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/QZTAU2180100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067bae0bed100e04e5565278f88a90a7b1ec3bd4e551657f383c0770dc7245c0. 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/QZTAU2180101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb413fe98c69d5f65f5d4012aa24e9a70328858d63aad71b3469ffcbebfcc65d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GX5MY2231680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba4c1a26425e260d943f5f459f0262e7f66e17735d054846b5bf4266f6fe99d. 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/QZFZ72372337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04279e53a190f03a2288f5cbece49200a672113153f08d7c7ea64c0226d068a. 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/QZFZ72372338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae252e7d7ab142852c98f1704ded8f86ae5a435c1ae237e0715a5036e78853de. 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/QZHN72578713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497f0689328c7589bf45dfea046838467cdf1b4d565eab702e75a7a2f014d490. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S2570963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9968421b981b8ea9c140aa802a92464568c5c04f82e3d8fe4e9c0615481a07bc. 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/DGA0L2499460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0c1b6e16378e8e7e886265ad4bee8f00b6534ea1d3533e83069c5b71d17c1e. 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/QZHN32185102.