1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xe1a2cfc5e325d895aaf635677073176bb91897aab9d7bb496ac55f638bc677c3. 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/e20c1342-781f-4af8-acef-520e48031fc1.json and https://artists.proofprofile.net/proofs/artist/e20c1342-781f-4af8-acef-520e48031fc1.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 → block OTSBitcoinBlock must exist at that height 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 0x3965e875375072f4e5524532442d2f9cca8c88a3588b3a1d6b60c64a832f341f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFYW1932756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6b05907f23484ad8e82b22759b899ee18208181d10664af7a39a0c79e8dbb9. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZHN51983620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292bc23c37dbad080046e9ba310ca092472491e23c42cfc069377be67bbd7d6b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYX2029778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10ec7f976bdcf6f9f7d19b8d8b9b8bb343a3d21a3cf7057bdbe35f3eb9ceded. 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/QZHN52082492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb9516878e01f3d77d196078b47f6072416cb8f2a9ef6b2a287edec85bcf76d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN82097038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8788a8fffff20f76bcd47276558f5281508b388b1ea89fffc709c62981c921f5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHNB2023137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c39fd3c26905200ad178e5282328627590f7418ac6c30adfa78ff6c06e4e06c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZK6M2028839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36765a5f0875e3be63c81dd3f864bce01ac4d37d58ec937270efd6a795afd38d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:47:06Z), 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/QZNWX2094769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e08aa946a36113569f9a672a9e36efb795f876fdb70930a3598409f403bcd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:52Z), 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/QZHN42188808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497936d7036d99f14b1b4cff7c553b353f51b715ea8fa828e800868033928edd. 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/QZNWV2130547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0b7ac98cc068a96e1c3ba83ef970bc5d5fc1c63efd380df1badd28e4756556. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZFYZ2234178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939b6b9314df543c576a36666a286495c60b773c3dd31a01b6811fe46fc9a24c. 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/QZFZ72248873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80de2645e2c524242cb44521b0b22ce70e1647c6bbea646d8b70a219279c5e1d. 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/QZES62240276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ae635f782cc96b453242a186a097de95aa977bc66ff9bc07e438692cedaac3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZTAY2213517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092c4f46a6a32e95002ee292bfe4a3ea1f7e66a6cd7ab6c962516a07b24a60e8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:50:47Z), 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/QZHN72323859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6708362aee0227eccefc63803f504ed3f7db7f80547d1a3d5c6d66e966a7b0c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6L2320423.