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 0x032683c0a6d420a3dbb230f1904bc3722ac11cdde14ed3a7f941d7713e264867. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/925c62fa-d7b8-401c-99e0-23337adf0a82.json and https://artists.proofprofile.net/proofs/artist/925c62fa-d7b8-401c-99e0-23337adf0a82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Prohibition 2050 (Brigitte Fontaine cover)
L'Empoisonneur de Chats (feat. Pakun Jaran)
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 0xfbcab3db20f875e112d864aa0a2e7c6c62b359df83c8d6189cf8091ed9222c4f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:22:37Z), 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/FR92U2100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f9169a84e4ecebcfce112e59f7d095df4fe15eef7d79f882253132bb50f3b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR92U2100390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac65addf47dd7109a3249ebd82aebb20ab3fe4162f24bef911a9c15541b9e01. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR92U2401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacc434c087b43845dff009d00b20484fbbbc386adc8799e7d367d4ac97629db. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:56Z), 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/FR92U2401130.