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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894c5d90f0a357c96c8df8cb433e730d80af95e8bb2c545d3979280bd085e01b. 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/17a50e75-4827-4e53-a0d9-1f8fd7a0ed15.json and https://artists.proofprofile.net/proofs/artist/17a50e75-4827-4e53-a0d9-1f8fd7a0ed15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Disparu E.P Incl. Two Coats & Ben Murphy
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05ccc57a617289cf9331e40d3ad9c0b79295c82e4053ca861323b2d2986b232. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/GB8PY2400337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265866663d6b696451edbd7a687c6a78943c3e41a97df56a32ff8fc050efac2c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBJX32352542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fa9da30e367e01b211fe56e3b4493f913ee54f0b35dda6c9ef20517c42b41e. 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/GBKQU2314998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9664fe5c32085c3b8ee10532623bc3fbdfdf1bb48c46bfe64b344747209d29e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLV62205171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3896a905e8893d4d7e4146fb4e6cb2ad7864e8b55e74ff27a2350e3b48b51a7. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBKQU2194127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74faaee308452633b0a74b1150248d9f13814e018a04a28b81ab4b61f1c4d586. 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/GBJX32352522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119f90d4876a4acb37725fbc4179c3b4c880ca5ccccca47a85841a86a378d4b1. 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/GBJX32352521.