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 0xfa41f33a047bca70a99fb2a3f01314264f260bd6e4529f67ace7a54f582b2c9d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dff05639-68dd-4fbc-968d-acb9d1a7d59c.json and https://artists.proofprofile.net/proofs/artist/dff05639-68dd-4fbc-968d-acb9d1a7d59c.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 0x97473ae4df4b14eebb301d250638decbf8c306299730f539a8e10d8cfd6ae448. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:49:32Z), 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/GBAYE9701204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3da31b3dfdcd5386ec46d1f358c8be1f90c166e355db6d770f01d58fb70d3f9. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/GBAYE9800443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e30fa397f20614e601841e4c0429a986a66b76b9fea71d020cbf6de5010f09b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/GBAYE9701202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d9d6db6167119c419c5c9ea99eecdfb33a3eb5241850fff5faa1e5603315ba. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBAYE9701205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6751fb9e5330fff71456149c0671a4c28406b7ece09681e18d618d87c6be7df2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:47:06Z), 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/GBAYE9800441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5566b093d2bb448482e80c1e079d4c8b7bf0c822aa7aafce81f6c2355d4cc329. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:00:31Z), 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/GMBA21410844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0374d551c4882fc3683a160369d59c02246bc146a88bd639d0f6df894fce12. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:58Z), 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/GMBA21410848.