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 0x2510e2fdb8386a0ad48b75fdfcdc262db77afd03b9ce79edb9e1ecc41a615f96. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/883243e4-299a-4b18-9721-afa204e53176.json and https://artists.proofprofile.net/proofs/artist/883243e4-299a-4b18-9721-afa204e53176.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 0x33b50269cb85566412e9067fb9f6a7d86abd4e665fe5daf4e0f2f08d4366feb8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6H2212047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2ca703074148ea25f0501d13d42497f892aaf2a58a33cf6e824b03a54c26f9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA72374837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94efb244ed8833e1346d16a4ecfbecdbcaccd43efd0e9c11b32773c928b3dff3. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA72374838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92410587b2cbba91d75e8689516f1566f4887417f713e42e48ff9075b0dc4d5f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMEP2378517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee59be635e33f340f7a2d1271589e8993a0cec2d99c2a615328207421cac4a1a. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEP2378520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca986dbf20da5257bd7c680e65fa7239aaf2a492cae4e632f0d68f21360a858. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:09:40Z), 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/QZMEP2378522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd346f78202765ed5e4325eb6d4998814fd5db3e83c54cea1dcdf95e44117dc98. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZFYX2406880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781c97c84edc9c94ab5fcce2ee4d492ad6d688bf7d0a93b2029d1598ac2dd59b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:54:53Z), 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/QZPLR2428021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e91c75881d4e357037e0360bcf8fcdf0b93e7d83bab75f93565cff8a89b967. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZPLR2428022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5c6771e7fd998f0a50790042f7940cc7ce6ab3abf8b8b2a275850320b78914. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZDA72504454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36cd69b5c1cbb80771314103e3a96f3952e645a6491c7bda2533fcb40f40a5dd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA72504455.