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 0xd5e5c554176881d86478f056cde87c289372ee24f084e50c7a6861fefb46614c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1304700-c746-42ea-afbd-fd0a56a3c8b5.json and https://artists.proofprofile.net/proofs/artist/b1304700-c746-42ea-afbd-fd0a56a3c8b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bosnie: Chants soufis de Sarajevo (Bosnia: Sufi Chanting of Sarajevo)
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 0x0ef19328832dd5eef849ef9410ca7498dde8d39464b67271d656592150e6a5bf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CH1399792702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e57ac835af77d0fc340fcff7b36b0874cb68b494ae802a45fded17225b9047a. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/CH1399792704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c1ae50240d648754af8457f759cebea2cdf0f6f8d24888cdac214adf3e1315. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:20:29Z), 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/CH1399792705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c0a7922963904fa08599cf7e388f0c5d48805fa87c206711a8d23ded99ceb5. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CH1399792711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02f886b88b5fd6edeee78ae43ec0fdbcc23c8ca7bb4f7704c7dc39e7fedd1ab. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CH1399792712.