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 0xfa37ead6f6d163bdb09f5a6e9e06a0325b526d42a9371d3d1aaa6fd245ce2771. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54bf21dd-0ccb-47fe-84b4-454d2006f4c2.json and https://artists.proofprofile.net/proofs/artist/54bf21dd-0ccb-47fe-84b4-454d2006f4c2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pièces de viole, Livre 2, Suite No. 2: No. 38, Cloches ou Carillon
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 0x070790959331cce722b7f6b4979cb8e09afe1461cbe7c336dd077dfba88b4ac8. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/FRU622362403.
Pièces de viole, Livre 3, Suite No. 6: No. 82, Gigue la Chicane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48627d52d1dfaf2b9a926e869b1dc6c7444fefc577c0f98b6dc241dc4394b8a4. 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/FRU622362408.
Pièces de viole, Livre 3, Suite No. 6: No. 86, Plainte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4602920df13a288e928d5e20815270e8a5a8c9afb5182a924372989775b4ab9. 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/FRU622362409.
Pièces de viole, Livre 2, Suite No. 7: No. 116, Pavane selon le goût des anciens compositeurs de luth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85ca177feb047705716f1323744d9f495d586329efd454e7fcecfa5202684d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRU622362412.