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 0x2180468bae1dbf2181a809bf3a0b452b7e6cbcb495ccd8e65c1dce13eb6f7a56. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b6793f1-8f9d-4676-97ee-69582065d71a.json and https://artists.proofprofile.net/proofs/artist/1b6793f1-8f9d-4676-97ee-69582065d71a.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 0x5f45827abbbe32cca282a9daddb51c92514698b2c70a608c4ba9aed1d1367761. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/ISB111900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc707800439170f1b2e53e0bb4eabdbea5c6bb9d4832c47acbfee35be3f1bf7. 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/ISV441814102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8913495e11ec9ba3c11c5da1bddbaa49350d8fc94bdcccfa79749694b6faa724. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:26:52Z), 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/ISB111902801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aaab5a36cf52b10706c52a7b9c3d045055fecac26f07828f14d0bb007bfefa. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:42:22Z), 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/ISB112407101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4769b594ec1ff2d34dc5efa601d687c13fec5102c352df18ba4c60d980f03426. 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/ISB112407104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e70d708bcabed02c78b4ad4f04704cf292c0c23543d15a48f0419c96abce3a7. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:05Z), 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/ISB112504001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4038fb5a3858ca6f7146109d5109829a4327ef1325caeb0f5c2d3addb131045c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:21:59Z), 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/ISB112407102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed86f4c890cf542aa2f0881787aa1e690febc0c42897dbec54610b241e43a846. 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/ISB112407103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4ddb1f19d49bec575b437d323ea3dfee5730f4669a19fe3119a3109e22c71b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ISB112407106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199fb9408d3630c90408dd9669a6f132b8a9f6844543af3e5e4bbd3199eb7863. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/ISB112407107.