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 0xe02e8a90ee84851846431b78a3a26677eb950ced916c010fe45db0bffbb4517b. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08bc50e7-554a-4f31-b0bf-e6b7119dbfd9.json and https://artists.proofprofile.net/proofs/artist/08bc50e7-554a-4f31-b0bf-e6b7119dbfd9.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 0x3a13e8be2f5cfc2a8e585aac7f5bd0f5c3dfe3cfd181f4a730fa67cbfcf41ed0. 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/HKG732128124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc116b7f9682edfd5ac9f9c9d88d60d0f82d32805dde28b1d92f7caded4ad198f. 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/HKG732276269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954829b824a1ef9cb963bfa8ac016012a6b3e8ce4d815aa785292a0fb41ace0b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732261482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec197d0039339092d839a6cc19aaddd0da7146d8c6e27d65255ad135445192de. 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/HKG732245809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019869ef5cf47079b3c32f2f854116faa52aed8f92579ff59f824ec422cf71a8. 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/HKG731793141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77376dc3186aac685c776ecb7692ddea18ff5a6f5e12b49f7aad15ea3356e22. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKG732122705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70ba3e530bbab94a10458c9bc283286f600c050d19bd70c3f7fefd7554ac087. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/HKG732112678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11317c9b349a91df74e5fc30c8c1b851dba2895cbcc89ba59aec9e9e59724b55. 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/HKG732131359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efd30019206faec64fad251d1b4196607352b7d34a30d591e09e420bf50ab47. 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/HKG732130886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6443988331cb3f20ae2eb96294ce71d7e40e308a976905cd1db033cbb7ffd7e6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HKG732041638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ae780107308768cc153a9f25679124d2c08cb1c342fb16bb2bfba3f66a1f6c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/HKG732041642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cea379a852a23650b5b5cdab6aaa0028d1f0147e65e918a2e77240b615e6f9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG732040921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13144a649bad201ec4886a7a574e84f22649c8571558e61171cea55a30d8d0. 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/HKG732025499.