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 0x8753b8e9a1071550cb59b23f3c0dd91fea11720d72e301a359cf98d7f5863c0c. 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/be331f4a-b774-4ac2-9c21-8f6758ea5701.json and https://artists.proofprofile.net/proofs/artist/be331f4a-b774-4ac2-9c21-8f6758ea5701.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 0x9dc2cc0dded2a0004936cdd620aa8f01bb5cb62bb8de9e04af6861f8b14ac249. 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/QZHN82168082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd9c18b464db389c905a4f966cf6ca8749f12c3e89a95ad3193a5827f494384. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN52144225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf6671e133cc5532a16c5e4acaad4524b1fa62e103d9b3a3a298a85cddd50be. 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/QZFYX2113794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c58227dc17f1ea859221ffee7de123d1adcb53ca15c1bb3f8be4e3c367865c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES72186540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f7332fdff1742fc3dcfe2dd5f1768d0e6e17201d41aa09ed7fe42c5312d0cd. 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/QZPLS2153431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511d179adca3c106eb4a914a41a8938521eae7490dd50f13879f6912c8e8d33f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFYX2248802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9083136857fa2705caaa48ac67465591adda5f2cc66f237696064ca8daa8ea. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:55:12Z), 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/QZHN92261842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d219b0762b41886ada3ff171b438064bfae4fcdad458b251704ca676831f58. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6G2271092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf069310cb34156fb09938a5c98ef9a07644ea2769956e9519913909fc3402ec5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:24Z), 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/QZTB32211145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86503add8ebaec3c1e654d9a70231ec0ab92b361e6ea6fef400bf29361b452f9. 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/QZTB82209543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8dec7b78ed68197ec9ffa422a62e19c78fe4d6ddbf49a66f705e1e846cc82b1. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:29Z), 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/QZES92390974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23029b6ccfde217ca3e72b6a117ed677d8211a550d2762645c1d957a81cda82f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZNWW2398232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea6dac7a7ecf455001281ee0ede3c75f0ceced032955d62053868d286eac1f3. 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/QZPLR2324977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780042ebee7073623f75aa806d716dcd255c5c33b1cf9d85601618ccf2c01e9d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZHN42464089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae0104607dfebb6c6a998cefea0d06ab6e9cc12c6215405b735ad9e30397038. 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/QZK6K2445285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49553495877308a4819bfd53933527130b1e5245146c4bbb31feb2d7971c6ad0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:12Z), 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/QZWFX2413224.