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 0xe084e218ffdeb5cf7355eda83cfefc9fa77df9ce9ad950cada8fe37b7cc2a6c6. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2924207c-8a8b-4166-9338-831cee2f24bd.json and https://artists.proofprofile.net/proofs/artist/2924207c-8a8b-4166-9338-831cee2f24bd.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 0xf6d98db7050ca3591e96cab3884c8d10b866d0dde2bc24e9002b8801347fe685. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:23:18Z), 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/GBSMU7135191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779f223e331be0fcbb2a84974ba9ff8d0eecf05ae56ba13da40f8b727c5949ca. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBSMU7135192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f71cbac2d316161bced97678e073148ddbe0b551440c1823a12f3d9b5348e9c. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:15Z), 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/GBSMU7135193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e222631fc0ecd92a92c4ad2bf99dee5974056ca5e3943d8181525edc2c1036a. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBSMU7135196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60844ee0a43881419ca4b4221f9740e193eb8832828a61973f3d33e7d243eed9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBSMU7135199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e12ade8bd01b31589c3bc49adf4576751a4b3bdf27fa04d48db43557947910. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU7135200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd799c5449fd4013362e0b3249302be7a722c040860c96d2ebeddce8f66af8ae8. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBSMU7135201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a401f5e83bd43e0e77dc8769795bae970bd9b2551ee8fc208eea3bb0294e16. 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/GBSMU8341271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b96e0e76d1d5e26e668dcbc25dbd9e0907aaf94d066a67b21d5a8bcce3baa0. 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/GBSMU8341272.