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 0xaa28a358a759d5e56a35801734bf68d15869c143701592575c77b40b1420c808. 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/fef7bfc5-dac4-4e96-8f34-c79db7b400f2.json and https://artists.proofprofile.net/proofs/artist/fef7bfc5-dac4-4e96-8f34-c79db7b400f2.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 0x64bc0a45b680e28709eabbe04c6ca04080b9e4f8b7b7aa97b57e106696797786. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:02:56Z), 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/FR59R2008084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd301096442ea04ab52348a15abbd2c5b38665610bc85c8ca8e1c424ea6c604. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:41Z), 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/DGA052041014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fb68042c87f8f4d6c7b171e1514db2da5161dd9756a02f7ec39b93581a5ad7. 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/DGA052063125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb45903c69d642e39bb71f86ff8fa39f215ea79b1a5fc42df7123f4488a6227. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T00:40:25Z), 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/DGA052063127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cee2622c5425b314b4816a04d42ae7b1c50b597654fa75905f7581268bef8b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:46Z), 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/QZNJX2089603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062d27ce2291286120baa67e49e2a3e0d41dfdf0ee6f87500d18e27a090449a. 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/FR2X42144061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ea79f3d748da7cc597c294b41235cd3df0e04ff6e25dd993aab20cc546c48c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR2X42144062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb66f3fe9b46106e3f5cc93bc4b6ef4d936db7916c53cf51a7729db6dcca8885. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:32:27Z), 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/FR2X42144064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c519ff7cd195abb563f5624e2174df1907f04e469de68d37fa9676a1e2b3590. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:28:47Z), 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/FR96X2150553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9c67952ac1a4a041b97fba97263971688266f678fa6e7e27fba306649b8556. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR2X42223088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420a5b4b8b89f672b66131961c823c458ed6e61dd196f6326fca3418fe9df830. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX452520064.