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 0x5e0841cca079a50afa071845fb9fe9ec7a0f26dbe9a86fbf3fe121236d5d82be. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f79b9fd0-82d9-440d-9900-3596b22cebef.json and https://artists.proofprofile.net/proofs/artist/f79b9fd0-82d9-440d-9900-3596b22cebef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wojna światów: następne stulecie (Muzyka do filmu Piotra Szulkina)
Christmas Carols (Dzwonia Dzwoneczki Muzyka Gra A Koleda Nadal Trwa)
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 0x75672fbb34ebe7d286ffd8234465a7ad03b3a4db4d9ce9c1e14459832dd79245. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PL16A2400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53540b33fc5dcb96622aba80276a38ba4a950c434b606f5660b82e7b13684fbc. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/PL16A2400513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06e885939ae64fb240e364289a9a8e65cd5376e407350365501f87260b54e92. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:54:19Z), 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/PL16A2400515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb724a389111620a361eddab0b1d67b4e3e7665ab1f546cbddbec7e2ebec8326a. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:35:48Z), 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/PL16A2400516.