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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236ed94ba8fc28e148879e455109bb1417be687c53e7895ff68fa3cae8f19ea4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76adb035-9eef-47fb-b867-56e20588b447.json and https://artists.proofprofile.net/proofs/artist/76adb035-9eef-47fb-b867-56e20588b447.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c694033c7029df957740f85dae6886892f35fc019a6853c9bc31b92aa2f32c8. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USNRS1330617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a56d00d4fd284899e2dbf5dd82b0753ae004e4f9223dfa8ef696f5e05038daf. 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/GBLV61633662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071967058417bc4de4acb73e0934f38cd9f9131f85623cd48945088c8313aa7. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/GBQ2F1157082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f7c1ba6554a5d58c3244feef77a8a7b52fc68e9afbab18e580d37fb2357e6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US83Z1454624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f698d76e5573f8cb662a4bad225b9113f179f1482464257e352ee8399335d13. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CH3131512213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa717f8bc5d86b257543f5a612bf2dbf00bc00cc33b54c046b04f036b6a9dc8d1. 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/CH3131512215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85ea4382f3180ff743a8999c47133051233e0b423bd409650f61074f4adee1a. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH3131512218.
Don't Kill My Vibe - Vintage Culture Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0981b51fe2ef7d40c6bb5d4bac03059f87df2512181611b026c4502300a6877c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKQU1572310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89388d65b60d4c1744c1d4d2f5fabb0e2ca42eb6cf1898a5e9a6112af5521eb9. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/CH3131813853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa717f8bc5d86b257543f5a612bf2dbf00bc00cc33b54c046b04f036b6a9dc8d1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CH3131512215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7c0cdb3f7930bb6fce656ffc236a9d1296bd5720202a5f3e5b60ea292b0497. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USQY51589160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf987d9f11a640eb3a41e69d52dcb3a3715b88ee7984c6ead5df3fc63cb317558. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USQY51589161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb96ff33dc20086951b147ecd74c9b1dc6c0f6d484bd05404d6784b963f22310. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USNRS1332498.