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 0x8cc881734af0eec01e4c6f328bc8be6cb1ae3415fe946b8373f7d569817250b3. 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/c1da82ac-76b6-49f3-b61a-b1876b780011.json and https://artists.proofprofile.net/proofs/artist/c1da82ac-76b6-49f3-b61a-b1876b780011.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 0xbba28b9208b2d8941eb9f2b8d049e9364cb8788d00c626982cbe90a855e9bc0f. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:19:53Z), 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/ITWHB2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f8105d06a3b0e3a19620c21d2d48d8857654b56598f1e84b1916fa2e884660. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITWHB2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189286512bb7fd13fcd52e6975f8690f08079266dc6036b47f39e5a09113df0f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ITWHB2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca3e4924d3f9216a002f2289656d5ca07f407dd2251e33cb1f6f6283c83b33b. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/ITWHB2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bb360e7458d53943f5ae36d73417a33ec4fab037dab3b3690a5edf2af8f77f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ITWHB2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5209ed188133d9f10416489443af02b6dc92413150cc85c16d8a40e7f84f5223. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:54:42Z), 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/US38Y2409808.