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 0xb7124e8f2a0dcb634536fcc9a6bf6023ee51bfc7c11dedc498b0d59520d0fbc1. 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/b16dc287-9405-482e-a02a-9dd945763da4.json and https://artists.proofprofile.net/proofs/artist/b16dc287-9405-482e-a02a-9dd945763da4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peshref & Saz Semai / Instrumentals of Ottoman Classical Music
Peşrev & Saz Semâî: Instrumentals of Ottoman Classical Music
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 0x1e85245db4bfb3db9f52ea4f99a051940b2cb7dc85ef9425b0b3099a0521a965. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GRHR10842803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308b4afcd5c7c685d5d877b5a89b0878361eaf1da2fbee985a01906c34d81c83. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:45:52Z), 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/GRHR10842806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e62dc37649fd15493bbdd0cc9c4f06741439657f716cb985d89754460b34aa0. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/GRHR10842808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5fc7b5b1ed9afbf2171f6ff827112d663a7857064212ef59c2059a8ac30ea0. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/GRHR10842815.