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 0xebfda4588d514b36e628e8d39edfaa2d4949724673cbb933d37bc377b99b1b09. 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/68605048-0a41-4859-a384-8974cc7dade1.json and https://artists.proofprofile.net/proofs/artist/68605048-0a41-4859-a384-8974cc7dade1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nabucco, Act III: "Va', pensiero" (Chorus Of The Hebrew Slaves)
The Dam Busters - Rousing Songs, Anthems and Marches
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 0x214b8cbc7d9c446256a2c171e03e675bf702af99cea281fd421ba3cbe1e9ea58. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUAB00950362.
Nabucco, Act 3: "Va', pensiero" (Chorus of the Hebrew Slaves)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214b8cbc7d9c446256a2c171e03e675bf702af99cea281fd421ba3cbe1e9ea58. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AUAB00950362.
Swoon: The Ultimate Collection – Selected Highlights
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6194a72ae4dde8db118be7b669a9aa528b67972b2e97eb89c2a521e75ec269. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUAB00950365.