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 0xadba568ad291e38760c6676baff8960c246fe84f33c0c7d7dfda6ae03bc1c9de. 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/4cbaf85b-3d50-4a44-8573-8a5d53343e40.json and https://artists.proofprofile.net/proofs/artist/4cbaf85b-3d50-4a44-8573-8a5d53343e40.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 0xed1e6da7661f33abb8f5108defc93c8781cea9d1dc001902e2be7498a658b2f5. 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/QM3DF2205854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8082cc324173264dfdcab8ce5f15a931224e29affe9fbdc6388e48edb8f4131e. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:54:14Z), 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/UKZGC2303770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10535843dae3cf66b1c55968dcefb832607ebbcd2cdf64bcc5269784b511d6ba. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:07:56Z), 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/UKZGC2303771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6241a0928f61beec71653a75124d207e8713ac4a3d818350b3622fd9ef70805. 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/QM3DF2288541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4716220631a2438013a4ddf7721494c4e3ad6bb5b9cb322c82d480300aa2162a. 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/QMANG2238783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7f5752410aa193eb16a2fb95cead97b13768a67e656eb67f207f2f910b7c1b. 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/QMANG2241231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb459a3b635b383ae824d0787e00efb1c39248a6e6fcf6dffd268abe813b3fc2f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2490277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2419fde93dfeec19ca20d147f981722985cfc4e54a06ba6fd410cd969e152c. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZPEW2451242.