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 0xdba503108ed219e563ff7f3adeb8fed54beb84407c3c577598feb6ebb60232c7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8d2acb9-e84a-40f3-bc4f-1638e76c44ac.json and https://artists.proofprofile.net/proofs/artist/c8d2acb9-e84a-40f3-bc4f-1638e76c44ac.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 0x9fb0aeca46dafcb325a0552f964e669408abdd50a799eb152c52a27ec8109c7e. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZHNC1973451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5e8dc163157042b9b6948634da6c62c48d69d12ab0466e179915d6d0349b70. 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/QZES72032285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8516b26e85c5738cbe932b4cee2fd5c27148749a77af41a2dd75ad24e16bc2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:31:42Z), 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/QZHNC2106273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91b8fa873f4e88c48aa32399f2df5e34fbe6eb72986ad91b595dc1f46be2931. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:44:18Z), 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/QZHNC2106276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f04caf420eb76120317973e9bf293384262cd041aa9aebbe2bd27ae95511d6a. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZNWV2102610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fb2acc1ca5c9b915d67a4f57108f7f29c743205ff34c1db034efc5a095ea0d. 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/QZK6N2011631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d664dbb55fced43531fb6793053928325d4dda792049193d812d7d3ffe2b93. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN72004905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15df658b4f2d436402dacd891773b6ded4b9de7d685d119cc48a680f237760c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6Q2025522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1987ed2523df74d85a380553b47b9c2348e4422f4ae33d50019cb7c6aca61b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6Q2025523.