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 0x3e7c48257542030a0b287506a440dbeadf1205ca9ffa884b699073ab0e5110f3. 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/edaed128-518a-4a7d-9c4a-c7f7ba8e26be.json and https://artists.proofprofile.net/proofs/artist/edaed128-518a-4a7d-9c4a-c7f7ba8e26be.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 0xb0837b60a296c6b5624fa84b339bef7304f71821db22873987353144bc337326. 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/QZHN32124903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf747f66dc23b3cd9509ddcb6ed2c4b1aff2c3f7c44b696d955b42701bd920f. 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/QZES72192833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f737aea5308b86327c53139028de4c2efde9167af40b9d1b4403c1784275fb. 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/QZFZ32172643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75165d0d5ae8cf9a4b5fb99cb127a68a8fbc1b3091f02d23f17769c0776294d. 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/QZK6F2001852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d96e3409a66229eec382bb4bc472853f57e69b07a120b1fe8b1367828238691. 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/QZK6K2010788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f58256a23720cf7e8997fac8b26c3a43abfaa9a887b576e4ecf11772445eb86. 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/QZHNC2053973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494dd49ec580fa16c6dbd6e770b1933eb0a6e53df09ca420d229e06552e10157. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZHNA2037409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b92fdb2b37ca5dc96feee3d12a3f0b4d611a669c00839726d8a8f499ed36277. 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/QZES62091307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b23e91b6af534b400b7e9ffbfbb54d4842b1d6ef33bfd84ea32628aa38e1fd8. 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/QZFZ72096527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9973bb7a35f3bd586538574df168c2a80850ba81b5b400b3e1033a5648e5106. 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/QZFZ22065229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7523576ffc75db22dffe165c2f29862091a23a09d19acf2553f6207e68a0d1. 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/QZK6P1914750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64082579b29c15473368ca14829ef88c9af215b4799fb4ba2a6fb9404eb3a8f8. 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/QZK6P1916104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c639b0a2fa9f318d3d411e0572e3f07930ba1348d76eaa5a3a84993859e384. 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/QZHNA1932654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cb44ededa70301f7627e3665a951316ceed842fb7af78faad5bfe446d5c10e. 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/QZHN81907218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77e8b2339fbd431627439e6cccaeadc7c3a62309b878c276d13678e003544c4. 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/QZHN61909413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae56b502470f0b817ec3a2cd1a2980df43ad1369a7a5e6cf2f03f05dfbe7b6a0. 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/QZFZ21978709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08596b0f84c9bbf611b51bb8317977798429d96561366eb6c883c6cb95eb6dd0. 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/QZFZ21980733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa865a500aa303f9e0eb54fe923bee467e81783b62c303b207f011256ac7ce932. 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/QZFZ21980732.