Cofer may refer to: 23788 Cofer, a main-belt asteroid, named after DCYSC awardee Evan Mitchell Cofer USS Cofer (DE-208), a U.S. Navy warship, named after John Joseph Cofer COFER: Currency Compositi
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9735e4935c0321006eb0dfba28b474e39da5b7f31725ed21e551ca30c19ed0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/208def7c-dc08-4f03-96e9-9aa7e3fa0ee0.json and https://artists.proofprofile.net/proofs/artist/208def7c-dc08-4f03-96e9-9aa7e3fa0ee0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
You Need to Calm Down (String Quartet Cover)
A Bar Song (Tipsy) [String Quartet Cover]
Everytime We Touch (String Quartet Cover)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac321d7ccdfbf16cb6c3aee5d04040cb7514183cbc82b7280c4a0b1e6379aea. 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/QZVR22400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5cf24bed768b49cc59097675f0cca48395fa927ce4371ff3665767e6f39e4c. 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/QMF922450065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5cf24bed768b49cc59097675f0cca48395fa927ce4371ff3665767e6f39e4c. 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/QMF922450065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c45e870dcaa114ebb9a05a019ca2c68a66b5bc6fe0524ca7499dd543557c6e. 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/QZW5K2300012.