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 0xfb4b7dd3bd10432e29c86c2ef5a2247e61edd4f8fa26fa375919d39710cefbe4. 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/5bc44344-30f8-4748-a9c0-1ce4d3ae1712.json and https://artists.proofprofile.net/proofs/artist/5bc44344-30f8-4748-a9c0-1ce4d3ae1712.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 0xf9b1373f16fcc18c802a7fa8bc511d9bf20ff8635961e51358ea548fe373d6b5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES72489640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c0f0d62c17616602388d7d997bde0a57f6a2e239bcbeebefc898f755812062. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCAIS2431939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c0ebd4bd60425bf585f02dd640344fb8905d8ca7d3e361b7505e06bd21e0eb. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAIT2442659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c0ebd4bd60425bf585f02dd640344fb8905d8ca7d3e361b7505e06bd21e0eb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:59:16Z), 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/TCAIT2442659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803d773fd997b48ecf3bce43b80f9df8e8b4faa0c34b3203cdb20d15b63484ad. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:42:45Z), 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/TCAJA2454114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803d773fd997b48ecf3bce43b80f9df8e8b4faa0c34b3203cdb20d15b63484ad. 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/TCAJA2454114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60d0ea3ad9d59e98c8f1fd2f75a64fdad5eb02516682b9555f87968369cf123. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBRKQ2388398.