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 0xa8c8ba333b10f7034289f7901a3f457dbccb50e5ed92cf21b282eca8c700b77b. 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/6c0f3394-9c18-4e15-95fb-e9e6df1a49fa.json and https://artists.proofprofile.net/proofs/artist/6c0f3394-9c18-4e15-95fb-e9e6df1a49fa.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 0x09703c6b7cfaf3555fd889c8bfedf863525c62ec4315a17372dfa083215b59af. 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/PL2DY2302243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e74fe5ed480926398bd7e4978260356716733da6d4ebbdd8386eb89b08618d. 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/PL2DY2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e463d73587ae4b652b69177efe711fad3dee8fc9ee80f20d79b8621e8a47e59. 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/PL2DY2400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b28eb9816a32b0a00e764d4f2764381d7191945a20c00b940bd515f19c98e3b. 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/PLUM72400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42005b64f08b586aca449884e15fe377a33513ca71c6880b1ae8148133b05ca4. 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/PLI292200629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997f67bb47ed45622f1770239e36a1c3a508eb59a285518330a27a9e5047cb71. 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/PLI292200631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3a147056e4b1a5dd7d79f7cbda23c4f0b04131c3b67850e092cb47708b316b. 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/PL20I2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae731374389ff7e5c852baa5801f78083b5a1e98bb6e66450967da001647ec15. 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/PL20I2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8f53498e93bcb8aeab6c8707e0de10eba73d513b1ff2e617100026f194ebda. 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/PL20I2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d38ce979b17d11a2ac50f7a11dbc58fb7c21c822acdfddb31501be7775b714b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PL20I2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0c7481cdb75fb362122f36fe476c078c3c43bd39399f79bd73608406b6187. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLUM72400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a4d1ec54404c83b03aa80023b49fa5f25510b698ef1aa9711057986b8c051. 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/PLUM72400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09703c6b7cfaf3555fd889c8bfedf863525c62ec4315a17372dfa083215b59af. 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/PL2DY2302243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17536562a589e74d23dc1ecbedcec3d34bc2ecc3e0002b643ab6637fc37a86a. 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/PLA681802240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6def7d07e069cd1161094ffb7cecbff7d6444a23196c18723a82de9ef4f3b0. 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/PLA681602049.