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 0xaec02188d5fe29622e3744467f851f41384d0008ff77a82cc92d779468ebe20b. 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/86ce7eb8-b63d-40c9-a9e8-218293b55409.json and https://artists.proofprofile.net/proofs/artist/86ce7eb8-b63d-40c9-a9e8-218293b55409.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 0x9118b94296ed6838eefb653826302ae873cdc14caed767f4b8164f1e6af5d04d. 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/IL6652306318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a008e5bfbb16e2351d097ae5fb97ae12908cb07afef0ac6781b32ec2868abdd. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/IL6652306323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0a3d1fdab98c9dbccd5d3a0a3de18a46e9e21ddc8f05ecb069c8af6049ddcd. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/IL6652306303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d33b1a2753185af58085ac188dd87d435a20646973bb8cb27c2b84d699c413. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:05Z), 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/IL6652307303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c490ba0b7d91e7c1f511eb7575dbd12b635e45028d46fa846b0f9e9366be102. 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/IL6652307301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53746dddec7cecf0b565ace4ec4f13075318ef2346b5d162d2443d62eda1225. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/IL6652409154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60df28c97ab98523059237bf396c0c27ecd45c99473fccefc4917bd2124e6c7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:50Z), 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/IL6652411401.