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 0x033f05cd679f9d922b6ba8efec6f2b0ff2b390b299d518fc0ff7183816f9eb20. 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/60e27f12-907c-4faa-a153-2128b16acba2.json and https://artists.proofprofile.net/proofs/artist/60e27f12-907c-4faa-a153-2128b16acba2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lockem In Da Trunk Challenge (Instrumental)
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 0x07ec63332697f767cfd3417103b474d2d082fd5242fac079be53a4c20b825cb5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM92080075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34944c29e8a28d4f6724116cb6d9436ef841f6d8928b41a871bd37b96732dfd7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHNC1916259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b6c6230a67d38b759c2aa9831514fd8e59eb811c0467ea8e4c0c0d8c02c9e0. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZHNC1914425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a075e0aaf447bef91bfcfc4e779dee512bab2d1df8c3afe7d51085cd0f26c8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHNC1914427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e33abe01892218fc3f0717c17761930ff7aa02a49dfb2f87101cf7bd1d26bb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6P1996454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e3bb2e257328a00d695bcbe0f65065537380871ff2fbcdcd1374595ff2931d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:44:22Z), 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/QZK6P1996456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd798c904bbfeb7cfd9a1f2364084e126c27ae0d23dd95d0b22ba13b96ce4fe2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6P1996462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3604078c9438501c406be4237d91ad768c9f2ce0320c3ae30fa4fbbc7c9f73. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZK6P1996467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9970f07883d82bebc0fddb00c120539cf45058e91413c7d7ded150ee460e486. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6P1996469.
Memphis UnderWorld (Classic Remastered Version 2013)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60195dfc0a5be96cc59a4ada0e7210d6e9102eecd2e550a7dec4713691d7ab64. 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/TCABM1333256.