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 0xd720ecd6ac3f2ce9838680655e4f994721b44005ab11466badd682fb086c67fa. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/828b5f86-99ca-411f-aa25-722cb8bb3d40.json and https://artists.proofprofile.net/proofs/artist/828b5f86-99ca-411f-aa25-722cb8bb3d40.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 0x4834c14857f19f022c099ed9a6536689b90ac1ff866a39d746a3aeefdcc1666b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USHM80902722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf59724f34b6e0319266a0d3bb30de58fb45e7dc232ed23c520bfcd0d308562f. 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/USHM80902723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3627f34b546191c2c44f16797d67cf35457f9aa53016c512ebe2c17e1e9387f6. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:37Z), 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/USHM80902724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ba391541bd3576b5d1a1ea1b9472f804a24d5c0a821b70d8ed0fa22a7c6966. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM80902725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151249fee4e962c7833f593f39874debfa6e6407b093e30192566bcc69219196. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM80902728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5de4b0623bcc6a31ff73ada1062f3664dd47a20950d36fcd80e1bf8653e5b. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:15:46Z), 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/USHM80902730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8345528938f6f7eb9ba628d814f07f8a4e272b7444b306d8dcac354b8e096d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USHM80902732.