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 0x271a1b13f45181dbadbd5f1354470db2b1f16772215bfd669482883921f74979. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c356e07-48d0-40cd-884c-258715a4084d.json and https://artists.proofprofile.net/proofs/artist/7c356e07-48d0-40cd-884c-258715a4084d.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 0xac0fe97af59112f3aa9e4ab9c42780e411885438eaedc1ca3f76bcb296808c98. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKG732010000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2252aa8048179fbebce089cacb234cd46612a9421cbdf541a68267192218809. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR10S1667297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8856e5939fb3e249ac899681169aea89cb28d115e95c910718cc9b9334377d43. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR10S1667302.
Do Hits Presents: Year of the Monkey (Chinese New Year Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe26512648ee8b138df4a800465ebecf44fa9c327c7ac45207ae027ff4fd044. 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/FR10S1669718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e516d404336c48387ebf4f0717117054c939f20d1edbbb8ee2efd49aaed526. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR10S1669725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ab88b1c64375bab4095c8f82baf0e23dcfd53971793c5cff5e472b142ed6b6. 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/FR10S1669727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5d6e29a745c7ac4fe681008eec7536e6a9aafa982e4961e72f310c1f319ee4. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FR10S1669730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf664df447d37e80a3feda4c7988aaba6ace797f2d4fd0eb9e8ae47b04d297473. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR10S1669731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea52ae094e2e6c565679e89915c695dd5ed7f90328eb1df9929a045e5e0a098. 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/GBLFP1518197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176b280bdaebbdcd804793f7fae0619243691fe363b25477512df94616d9eda. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR10S1667283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73febeedba5c71c6962bb8a1ff8bac4ce6202e7d8e4fdf36e815e8ed733ec84. 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/FR10S1667284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa334458c0a31e698f072f351f61e27724ab691903904d3ade72e0ad67ec4edbf. 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/FR10S1667285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219ef5c482839d21150c0902f162dbbb7b0a27390bd2265ae9cd9877ced7ea2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR2X41658695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67cb5e960376baed76e280ac39ec0223472c072bf9d32c2c7ed78def2a7d952. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR10S1719367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecf93163bbe243ac3e70a223d3ab9fadcc851131859b56a9ee47b98b6feb596. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR10S1667220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc7a672257231d709da69a8f57bf5f358e1846684f67695ce3fea09dd47d14b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX762123172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec0c3ae2bc34e029d0e22b0f4d188ac9cc0acf49b7aa3c4414737392c303159. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRX201957208.