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 0xfab0da5be8120c3ea71cdded4ffc7f7a6f34b857591538a421c8a6bb58e4906e. 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/c6922108-ae7f-4968-9443-66ed043fe6bf.json and https://artists.proofprofile.net/proofs/artist/c6922108-ae7f-4968-9443-66ed043fe6bf.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 0x34a7c6a530b8dec35387692c8aef690c5e2d077cca0b098bcddcd9f3dd0e16cc. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZNWR2161148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d6e17a59c5a997ba6d92891c7dafccc39eac9dbf756fd4137485ef7af4fdfa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB22260089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042d14828ccd6dd73bf5a1d788012bd0cb6af1d7ecae5a83c1409632011085d3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:16Z), 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/QZMEQ2460115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831813e43f7ac611bfa980387f50406eae32adb500ee90739965f7f2dbd73407. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB92448380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cf2e71bf737f40497b66a0ee59aa8cba089635f690d527ead6a9f2918ec918. 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/QZZ782445969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ca05a178f8fce8f0af84ca84fe575ea37bdd8d9e93fdfac4cb5a1c934efbc2. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:36Z), 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/QZFZ62547261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6540704d45b0cc44c32ed72e25f9e644b88b3d90d12773e19ffa12500c62c77. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZK6F2509714.