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 0xb15b4f687c659054ad98ad3c034c38a9da448aca68367744d20d80e6c514ba64. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb24e998-e8db-445e-b4e1-daad2238d45f.json and https://artists.proofprofile.net/proofs/artist/cb24e998-e8db-445e-b4e1-daad2238d45f.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 0x4e44d70aa4b8a1f71eb78fec984dde1550c8193fc9d7f6f23085b95bad5d277d. 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/GX8LD2208280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdecb22c99b75d8ed8368f8f4c30938c945fae2da327499eccaada8a4f27db5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:20Z), 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/QZWDE2314112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4462bbf10fb086541df7e252ae42fd48a5e37bb735b5811fb37e0095ab9ab874. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USLZJ2489296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90bccca27ef9ff10d23951263a7e81ba368b4d0caabe0ae003496ee384b62b4. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:04:56Z), 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/QZTRX2474789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9e09822bec464906c888cd656966379480d1dedbf85444b3b9ea0f41ab2186. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:46:29Z), 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/CAQOI2508803.