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 0xb863d578367710ff899e79e9c4072e7394a022b532afca097e26aae8301af54c. 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/fe958da2-4091-4504-8460-fcbc42fde308.json and https://artists.proofprofile.net/proofs/artist/fe958da2-4091-4504-8460-fcbc42fde308.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 0x9abca3bdbfa8548b6a0199b4ba8d43ce4a7e6c7ff41531abc52212b091018094. 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/USHM21812901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc84db508fda41bed0ea26cfa022415c372dcf3d772dbc60279d299a3d86d9a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM21812904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5efb35405975298dab81f9a9d50abe81052796025d8a678de2458355549c5c8. 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/USHM21812905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e5a29d9bc7c8146921365162a543e6923196ab2599bcb8807fc2d1d59cd5f1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM21812907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e914f036bce7626526d76150dd7c0e68bb960e8301a06e9cf1d7e62ba0400c. 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/USHM91845219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f533f172287668768096c4b3f79e8699eb19a46ca3c593b5b15e4fdeeceea02. 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/USHM91845220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaa0262faf6d61b9911a8167a106f88788e1ed0393771fa17e72ccb60ca3da1. 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/USDY42044835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1440c49431ed1635ba37b986c6fd02de68889a392fdb6de5628bb4f8ea5b92a8. 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/QZF452001576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7de12b06d7933fa8c9cd30fe8760ae2091980c87db84f739b6a7d79077ea957. 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/QZF452001578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf6b4e94672300f72e0a1bf796efe2ad4da83f726ace063bf207cf1458e148. 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/USL4Q1943275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf92144cadbcdd36ea6114bfccbb13cee544a0a8b7b8609f6f13e34d9d187bde. 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/USHM81933048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bf9e9280c6f53629e5cfd13a8375ec57d220d194786e90a066049f6b4c3aa8. 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/USHM81933053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca018674f1d3ec992e9cbf6a3c4316c323fc33d2a7acabf8395c228a29d00d2. 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/USHM21934463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bba2b236783048a41e2ff4ed71b3a3ba80facd78bf91fcfb938c41f1b4a543b. 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/USCGJ1912545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f5c6fade50813ab12f602926e81e826a32ba386caff8b00219aa10529ca0e5. 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/USCGH1937867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95568bf536dea98d81aff124c5cd7cf37db8e6e79dbba3c138a95626e7ece196. 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/USCGH1937869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc493c7a1708f525a5b28fd6e6211b047b2af6b76228bf6f78a34267d6ceac1. 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/USL4Q1841203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6435953e7bb679fb7980ecdaf315b10a4c0ced05641aa28aa31320770bd48bfb. 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/USHM21880936.