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 0x3d0e7133c6a821f30489e558428f390bba780543ac8a2883915be826e973671a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cea91461-b0a8-4304-a734-d0f80b7a9c91.json and https://artists.proofprofile.net/proofs/artist/cea91461-b0a8-4304-a734-d0f80b7a9c91.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 0xd6bb36d03a285ba4f962ea518dbc44f7caa24e6cf725c1caa3defd25eb00bc24. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2349407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02873a49151a62b88d68e33f3b25aa9a033387911d98eadfb11ebae3feeebb5c. 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/USA2P2333116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827e87c50a07a443e42299522ddc03ba8ebe7589b302a19e2dfc37132a0c5368. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USA2P2349409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762abc38cdb0b6c563f7905d12f544d0426f4745682c453e8909330c72a76839. 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/USA2P2347822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee031dfe2141da7eac209918d2ded5d7017af8019c3a4834d7a2eb753d8192f9. 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/USA2P2349410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeba8bb70fd731c5446d4e4cbcaa3985695033ef10102f65dbd2b764c14bd87e. 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/USA2P2349413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4305b58c9e46dc1391908f5bbd32545d3feb98a63f8fb55e5850967e715f433f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P2349414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ef9383b5eb6f00407c625e1536177987ca81c347fcc0ae658db4a526220317. 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/QZHZ32193303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eaf07e2942693d8df5e4b88241b92701bfd603170183a3bb67513904156acb. 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/QZHZ32193298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7660435b8c2328ddc5b5147c514c22a75b8ee2ab80b0619f30cc0fbd6fa01cd6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ32193310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ead92154331c7d97d7104549fa5ea89e7c3a2a87a5af1a7eb193cc70a6ff36. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2055449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ab62cc016ed99f452434dd86d87a416ad20660a1c58c903d581dae41cdc490. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2055451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6618e6af7ea482b019f4567c583ae2e192de14ff5804bad590bd22e4e3375c82. 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/QZNJV2055456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733ba49a2c173a9f404741e123329aec92b36b51168ee24d53c8ba4139dba31e. 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/QZMZ92038133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6751574ff71bcd1b818c140b533744976bb7ce536004000a1e61c9aa0d1aab6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM7282526001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85daab43261b2dfe12d651cbf1c94b79cb3eb92a597444d5453286c1c9aceb89. 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/QMFME2406430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85daab43261b2dfe12d651cbf1c94b79cb3eb92a597444d5453286c1c9aceb89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2406430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762abc38cdb0b6c563f7905d12f544d0426f4745682c453e8909330c72a76839. 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/USA2P2347822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098d957a158752b0c688be3e84840cf0dc1c9096bd46c4893644b20e2277d17. 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/QZTVM2134356.