Mouthpiece may refer to: The part of an object which comes near or in contact with one's mouth or nose during use Mouthpiece (smoking pipe) or cigarette holder Mouthpiece (telephone handset) Mout
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 0x96169c7386fddfb5fd9f534de625edcb1a988b19f47080068d1682c224af25b3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c398b2d5-ed52-40e5-bcd8-8608c04559e8.json and https://artists.proofprofile.net/proofs/artist/c398b2d5-ed52-40e5-bcd8-8608c04559e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Can't Kill What's Inside: The Complete Discography
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 0xd1e2100f8d802a38a4c28dd003b891771815d356c9940fd5ae659a82f62db601. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:56:16Z), 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/USB4U0814704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4f45c7a92e6f91fbdb037fdf96067f51cfa4028176161d3bf14ddadc68437. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:50Z), 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/USB4U0814705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2e465aa027f1acc61a44226e13f984dd44a5cd1a283348b9977c6e020aef62. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:30:33Z), 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/USB4U0814706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b8cce155f99880dca0630084093d3964c89724c119df50b6d664bc8c0015ac. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USB4U0814712.